UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                         ------------------------------

                                    FORM 10-Q/A

[X]      QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934
         For the quarterly period ended June 30, 1998
                                        -------------
                                       or
[ ]      TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934
         For the transition period from ______________ to _______________

                         -------------------------------

Commission File Number 1-11152
                       -------

                     INTERDIGITAL COMMUNICATIONS CORPORATION
             ------------------------------------------------------
             (Exact name of registrant as specified in its charter)


               PENNSYLVANIA                                23-1882087
     -------------------------------                   -------------------
     (State or other jurisdiction of                    (I.R.S. Employer
      incorporation or organization)                   Identification No.)


                   781 Third Avenue, King of Prussia, PA 19406
              -----------------------------------------------------
              (Address of principal executive offices and zip code)


        Registrant's telephone number, including area code (610) 878-7800
                                                           --------------

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934
during the preceding 12 months (or for such shorter period that the registrant
was required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days.

                           Yes X       No
                              ---        ---

Indicate the number of shares outstanding of each of the issuer's classes of
common stock, as of the latest practicable date.

48,427,465 Shares of Common Stock, par value $.01 per share, were outstanding on
August 7, 1998.





            INTERDIGITAL COMMUNICATIONS CORPORATION AND SUBSIDIARIES


                                      INDEX
                                      -----


                                                                          PAGES
                                                                          -----

Part  I - Financial Information:

     Item 1.  Consolidated Financial Statements                              3

              Consolidated Balance Sheets -                                  3
              December 31, 1997 and June 30, 1998 (unaudited)

              Consolidated Statement of Operations -                         4
              Three and Six Months Ended June 30, 1997 and 1998 (unaudited)

              Consolidated Statements of Cash Flows -                        5
              Six Months Ended June 30, 1997 and 1998 (unaudited)

              Notes to Consolidated Financial Statements                     6

     Item 1I. Management's Discussion and Analysis of                       10
              Financial Condition and Results of Operations


Part II - Other Information:

     Item 4.  Submission of Matters to a Vote of Security Holders           14

     Item 6.  Exhibits and Reports on Form 8-K                              14


                                       2




PART I - FINANCIAL INFORMATION
Item 1.  FINANCIAL STATEMENTS


            INTERDIGITAL COMMUNICATIONS CORPORATION AND SUBSIDIARIES
                           CONSOLIDATED BALANCE SHEETS
                                 (in thousands)




                                                                         DECEMBER 31,       JUNE 30,
ASSETS                                                                       1997             1998
- ------                                                                   ------------     -----------
                                                                                          (UNAUDITED)
                                                                                            
CURRENT ASSETS:
   Cash and cash equivalents, including restricted
      cash of $193 and $139 respectively                                   $ 17,828          $  3,739
   Short term investments                                                     7,976            47,805
   Accounts receivable, net of allowance for
      uncollectable accounts of $897 and $933, respectively                   3,058             2,953
   Inventories                                                               12,284            12,094
   Other current assets                                                       5,428             6,546
                                                                           --------          --------
      Total current assets                                                   46,574            73,137
                                                                           --------          --------

   Property, plant and equipment, net of accumulated
      depreciation of $11,454 and $13,227, respectively                      11,373            10,301
   Patents, net of accumulated amortization of
      $5,579 and $5,969, respectively                                         9,292             9,713
   Long term deposits                                                           519               223
   Other                                                                      1,605             1,614
                                                                           --------          --------
                                                                             22,789            21,851
                                                                           --------          --------

                                                                           $ 69,363          $ 94,988
                                                                           ========          ========


LIABILITIES AND SHAREHOLDERS' EQUITY

CURRENT LIABILITIES:
   Current portion of long term debt                                       $    869          $    803
   Accounts payable                                                           8,223             6,539
   Accrued compensation and related expenses                                  6,013             5,551
   Deferred revenue                                                           3,461             5,963
   Other accrued expenses                                                     5,105             6,905
                                                                           --------          --------
     Total current liabilities                                               23,671            25,761
                                                                           --------          --------

LONG TERM DEBT                                                                3,591             3,323
                                                                           --------          --------

OTHER LONG TERM LIABILITIES                                                   3,596             1,429
                                                                           --------          --------

COMMITMENTS AND CONTINGENCIES (Note 2)

SHAREHOLDERS' EQUITY:
   Preferred Stock, $.10 par value, 14,399 shares authorized-
      $2.50 Convertible Preferred, 102 shares issued and outstanding             10                10
   Common Stock, $.01 par value, 75,000 shares authorized,
       48,230 shares and 48,427 shares issued and outstanding                   482               484
   Additional paid-in capital                                               234,765           235,457
   Accumulated deficit                                                     (196,752)         (171,476)
                                                                           --------          --------
   Total shareholders' equity                                                38,505            64,475
                                                                           --------          --------

                                                                           $ 69,363          $ 94,988
                                                                           ========          ========


        The accompanying notes are an integral part of these statements.


                                        3




            INTERDIGITAL COMMUNICATIONS CORPORATION AND SUBSIDIARIES
                      CONSOLIDATED STATEMENTS OF OPERATIONS
                      (in thousands, except per share data)
                                  (unaudited)




                                                FOR THE THREE MONTHS           FOR THE SIX MONTHS       
                                                    ENDED JUNE 30,               ENDED JUNE 30,         
                                               -----------------------       -----------------------    
                                                 1997           1998           1997           1998      
                                               --------       --------       --------       --------    
                                                                                         
REVENUES:
  Product                                        16,442          1,599       $ 40,218       $  3,762    
  Licensing and alliance                          1,768         44,842          3,955         52,756    
                                               --------       --------       --------       --------    
                                                 18,210         46,441         44,173         56,518    
                                               --------       --------       --------       --------    
OPERATING EXPENSES:
  Cost of product                                14,766          5,037         35,731          7,639    
  Sales and marketing                             2,117            987          4,191          2,054    
  General and administrative                      2,612          1,597          4,782          3,286    
  Patents administration and licensing              755          4,085          1,856          6,350    
  Product development                             6,451          3,820         12,702          7,703    
                                               --------       --------       --------       --------    
                                                 26,701         15,526         59,262         27,032    
                                               --------       --------       --------       --------    

    Income (loss) from operations                (8,491)        30,915        (15,089)        29,486    

OTHER INCOME (EXPENSE):
  Interest income                                   665            648          1,023          1,023    
  Interest and financing expenses                  (108)           (97)          (228)          (199)   
                                               --------       --------       --------       --------    

    Income (loss) before income taxes            (7,934)        31,466        (14,294)        30,310    


INCOME TAX PROVISION                                (17)        (4,383)           (34)        (4,906)   
                                               --------       --------       --------       --------    

    Net income (loss)                            (7,951)        27,083        (14,328)        25,404    

PREFERRED STOCK DIVIDENDS                           (63)           (64)          (128)          (128)   
                                               --------       --------       --------       --------    

NET INCOME (LOSS) APPLICABLE TO COMMON
    SHAREHOLDERS                               $ (8,014)      $ 27,019       $(14,456)      $ 25,276    
                                               ========       ========       ========       ========    

NET INCOME (LOSS) PER COMMON SHARE - BASIC     $  (0.17)      $   0.56       $  (0.30)      $   0.52    
                                               ========       ========       ========       ========    

WEIGHTED AVERAGE NUMBER OF COMMON
    SHARES OUTSTANDING - BASIC                   48,161         48,382         48,138         48,310    
                                               ========       ========       ========       ========    

NET INCOME (LOSS) PER COMMON SHARE - DILUTED   $  (0.17)         $0.55       $  (0.30)      $   0.52    
                                               ========       ========       ========       ========    

WEIGHTED AVERAGE NUMBER OF COMMON
    SHARES OUTSTANDING - DILUTED                 48,161         49,584         48,138         48,895    
                                               ========       ========       ========       ========    


        The accompanying notes are an integral part of these statements.


                                       4




            INTERDIGITAL COMMUNICATIONS CORPORATION AND SUBSIDIARIES
                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (in thousands)
                                   (unaudited)



                                                                      For the six months ended June 30,
                                                                      ---------------------------------
                                                                        1997                     1998  
                                                                      --------                 --------
                                                                                              
CASH FLOWS FROM OPERATING ACTIVITIES:                                                                  
    Net loss                                                          $(14,456)                $ 25,276
    Adjustments to reconcile net loss to net                                                           
       cash used for operating activities-                                                             
         Depreciation and amortization                                   2,346                    2,163
         Other                                                          (1,614)                  (2,167)
         Decrease (increase) in assets-                                                                 
                  Receivables                                            5,191                      105
                  Inventories                                            5,865                      190
                  Other current assets                                  (7,850)                  (1,118)
         Increase (decrease) in liabilities-                                                            
                  Accounts payable                                      (9,351)                  (1,684)
                  Accrued compensation                                     947                     (462)
                  Deferred revenue                                      (1,685)                   2,503
                  Other accrued expenses                                   727                    1,800
                                                                      --------                 --------
                                                                                                       
         Net cash used for operating activities                       $(19,880)                $ 26,606
                                                                      --------                 --------
                                                                                                       
CASH FLOWS FROM INVESTING ACTIVITIES:                                                                  
    Decrease (increase) in short-term investments                     $ 25,746                 $(39,829)
    Additions to property and equipment, net of non-cash additions                                     
       of $141 and $120, respectively                                   (1,486)                    (581)
    Additions to patents                                                  (489)                    (811)
    Other non-current assets                                              (360)                     286
                                                                      --------                 --------
                                                                                                       
    Net cash provided by (used for) investing activities              $ 23,411                 $(40,935)
                                                                      --------                 --------
                                                                                                       
CASH FLOWS FROM FINANCING ACTIVITIES:                                                                  
    Net proceeds from sales of Common Stock                                                            
       and exercises of stock options and warrants                    $    251                 $    694
    Payments on long-term debt, including capital lease obligations       (416)                    (454)
                                                                      --------                 --------
                                                                                                       
    Net cash provided by (used for) financing activities              $   (165)                $    240
                                                                      --------                 --------
                                                                                                       
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS                  $  3,366                 $(14,089)
                                                                                                       
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD                          11,954                   17,828
                                                                      --------                 --------
                                                                                                       
CASH AND CASH EQUIVALENTS, END OF PERIOD                              $ 15,320                 $  3,739
                                                                      ========                 ========
                                                                                                       
SUPPLEMENTAL CASH FLOW INFORMATION:                                                                    
    Interest paid                                                     $    158                 $    173
                                                                      ========                 ========
    Income taxes paid                                                 $    104                 $    524
                                                                      ========                 ========


        The accompanying notes are an integral part of these statements.


                                       5




            INTERDIGITAL COMMUNICATIONS CORPORATION AND SUBSIDIARIES

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                                  JUNE 30, 1998
                                   (UNAUDITED)


1. BASIS OF PRESENTATION:

     In the opinion of management, the accompanying unaudited consolidated
financial statements contain all adjustments (consisting only of normal,
recurring adjustments) necessary to present fairly the financial position of
InterDigital Communications Corporation (the "Company" or "InterDigital") as of
June 30, 1998, the results of its operations for the three and six month periods
ended June 30, 1997 and 1998, and cash flows for the six month periods ended
June 30, 1997 and 1998. The accompanying unaudited consolidated financial
statements have been prepared in accordance with the instructions for Form 10-Q
and accordingly do not include all of the detailed schedules, information and
notes necessary for a fair presentation of financial condition, results of
operations and cash flows in conformity with generally accepted accounting
principles. Therefore, these financial statements should be read in conjunction
with the financial statements and notes thereto contained in the Company's
latest annual report on Form 10-K filed with the Securities and Exchange
Commission. The results of operations for interim periods are not necessarily
indicative of the results to be expected for the entire year.

     The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities as of the date of the financial
statements and the reported amounts of revenues and expenses during the
reporting period. Actual results could differ from those estimates.


2. CONTINGENCIES:

     The Company and InterDigital Technology Corporation ("ITC"), a wholly-owned
subsidiary, are parties to a certain patent-related litigation in which ITC is
asserting that a certain third party infringes ITC's patents. ITC generally is
seeking monetary damages. The alleged infringer generally seeks declarations
that ITC's patents are invalid and/or that its products do not infringe ITC's
patents as well as monetary damages. ITC is also involved in administrative
proceedings in which various parties have challenged the validity of ITC's
patents.

     In addition to litigation associated with patent enforcement and licensing
activities and the other litigation described above, the Company is a party to
certain legal actions arising in the ordinary course of its business. Based on
current information, Management believes that the outcomes of these matters will
not have a material impact on the Company's financial position or results of
operations.

3. CASH, CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS:

     The Company considers investments purchased with a remaining maturity of
three months or less to be cash equivalents for purposes of the statements of
cash flows. The Company invests its excess cash in various time deposits and
marketable securities, which are included in cash and cash equivalents, as
follows (in thousands):


                                       6




                                                  December 31,         June 30,
                                                      1997               1998
                                                  ------------         -------
Money market funds and demand deposits              $ 8,979            $2,472
Repurchase agreements                                 7,856               267
Commercial paper                                        993             1,000
                                                    -------            ------
                                                    $17,828            $3,739
                                                    =======            ======

     The repurchase agreements are fully collateralized by United States
Government securities and are stated at cost which approximates fair market
value.

     Short-term investments available for sale as of December 31, 1997 consisted
of $2.6 million in government-issued discount notes and $5.3 million in
corporate debt securities. Short-term investments available for sale as of June
30, 1998 consisted of $24.6 million in government-issued discount notes and
$23.2 million in corporate debt securities.

4. MAJOR CUSTOMERS:

     In fiscal 1997, the Company's Indonesian and Philippine customers
represented 75% and 7% of UltraPhone(R) product sales. In the three months ended
June 30, 1997, the Company's Indonesian customer accounted for 83% of UltraPhone
product revenues. In the six months ended June 30, 1997, the Company's
Indonesian customer accounted for 80% of UltraPhone product revenues. Late in
1997, InterDigital began shipping prototype units of its new TrueLink(TM)
wireless local loop product based on its B-CDMA(TM) technology to its alliance
partners. In the three months ended June 30, 1998, the Company's partners and
InterDigital's customer in Myanmar accounted for 51.8% and 24.8% of product
revenues, respectively. During the six months ended June 30, 1998, product
revenue from sales to its partners accounted for 70.4% of the Company's product
revenue and sales to the Company's customer in Myanmar accounted for 10.5% of
its product revenue.

     Product revenues by geographic area are as follows (in thousands):


                                 Three Months                Six Months
                                    Ended                      Ended
                                   June 30,                   June 30,
                             --------------------      ---------------------
                               1997         1998         1997          1998
                             -------       ------      -------        ------
Domestic                     $   330       $  254      $   578        $  470
Foreign                       16,112        1,345       39,640         3,292
                             -------       ------      -------        ------
                             $16,442       $1,599      $40,218        $3,762
                             =======       ======      =======        ======

Licensing and Alliance Revenue

     The licensing and alliance revenues for the three months ended June 30,
1998 include alliance revenues of $852,000 from Samsung Electronics Co., Ltd.
("Samsung") and $1.3 million from Alcatel Espana ("Alcatel"), $175,000 in
recurring royalties from an existing licensee and $42.5 million from new
licensees. Licensing and alliance revenues for the three months ended June 30,
1997 include $704,000 from Samsung, $264,000 of recurring royalty revenue from
one licensee and $800,000 from Siemens Aktiengesellschaft ("Siemens"). During
the six months ended June 30, 1998, the Company recognized $4.3 in alliance
revenue from its partners, $367,000 in recurring royalty licensing revenue and
$48.1 million in licensing revenue from new licensees. During the six months
ended June 30, 1997, licensing and alliance revenues include $1.4 million from
Samsung, $1.6 million from Siemens and $947,000 of recurring royalty revenue
from one licensee.


                                       7




5. NET INCOME (LOSS) PER COMMON SHARE:

     The Company adopted Statement of Financial Accounting Standards No. 128.
"Earnings per Share", effective the year ended December 31, 1997. This statement
requires the disclosure of both basic and diluted earnings per share as well as
the retroactive restatement of prior years' per share disclosures. The following
tables reconcile the numerator and denominator of the basic and diluted net
income (loss) per share computations:




                                             Three Months Ended                                Three Months Ended
                                                June 30, 1997                                    June 30, 1998
                                 ------------------------------------------      ---------------------------------------------
                                    Income         Shares         Per-Share        Income            Shares          Per-Share
                                 (Numerator)    (Denominator)      Amount        (Numerator)      (Denominator)        Amount
                                 -----------    -------------     ---------      -----------      -------------      ---------
                                                                                                       
Income (Loss) per Share -         $ (8,014)        48,161           $(0.17)        $27,019           48,382            $0.56
                                  --------         ------           ------         -------           ------            -----
Basic:
  Income (loss) available to
   common stockholders
Effect of Dilutive Options
  and Warrants                    $     --             --           $   --              --            1,202            $0.01
                                  --------         ------           ------         -------           ------            -----
Income (Loss) per Share-
Diluted
  Income (loss) available to
   common stockholders +
   assumed conversions            $ (8,014)        48,161           $(0.17)        $27,019           49,584            $0.55
                                  ========         ======           ======         =======           ======            =====







                                              Six Months Ended                                 Six Months Ended
                                                June 30, 1997                                    June 30, 1998
                                 ------------------------------------------      ---------------------------------------------
                                    Income         Shares         Per-Share        Income            Shares          Per-Share
                                 (Numerator)    (Denominator)      Amount        (Numerator)      (Denominator)        Amount
                                 -----------    -------------     ---------      -----------      -------------      ---------
                                                                                                       
Income (Loss) per Share -         $(14,456)        48,138          $(0.30)         $25,276           48,310            $0.52
Basic:
  Income (loss) available to
   common stockholders
Effect of Dilutive Options
  and Warrants                          --             --              --               --               585           $0.00
                                  --------         ------          ------          -------           -------           -----
Income (Loss) per Share-
Diluted
  Income (loss) available to
   common stockholders +
   assumed conversions            $(14,456)        48,138          $(0.30)         $25,276            48,895           $0.52
                                  ========         ======          ======          =======            ======           =====



                                       8




6. INVENTORIES:

                                              December 31,      June 30,
                                                  1997            1998
                                              ------------      --------
                                                     (In thousands)
Component parts and work-in-progress            $10,249         $ 9,482
Finished goods                                    2,035           2,612
                                                $12,284         $12,094
                                                =======         =======

     Inventories are stated net of valuation reserves of $5.8 million and $9.3
million as of December 31, 1997 and June 30, 1998, respectively. The Company's
UltraPhone inventory includes components used in a variety of radio frequencies.
Some inventory has been identified as supporting frequencies with little to no
demand in the Company's targeted niche markets. Accordingly, the Company has
increased its inventory reserves as of June 30, 1998 to address this issue.

7. INCOME TAXES:

     The Company accounts for income taxes under Statement of Financial
Accounting Standards No. 109, "Accounting for Income Taxes".

     The income tax provision for the three months ended June 30, 1997 consisted
of a current state tax provision of $17,000. The income tax provision for the
three months ended June 30, 1998 consisted of a current state tax provision of
$59,329 and a foreign tax provision of $4,323,260. For the six months ended June
30, 1997, the income tax provision consisted of a current state tax provision of
$34,000. The income tax provision for the six months ended June 30, 1998
consisted of a current state provision of $77,224, a foreign withholding tax
provision of $4,878,760, and a state tax refund of $49,855 from a prior period.
At December 31, 1997, the Company had net operating loss carryforwards of
approximately $135 million. Since realization of the tax benefits associated
with these carryforwards is not assured, a valuation allowance of 100% of the
potential tax benefit is recorded as of June 30, 1998.

     Pursuant to the Tax Reform Act of 1986, annual use of the Company's net
operating loss and credit carryforwards may be limited if a cumulative change in
ownership of more than 50% occurs within a three-year period. The annual
limitation is generally equal to the product of (x) the aggregate fair market
value of the Company's stock immediately before the ownership change times (y)
the "long-term tax exempt rate" (within the meaning of Section 382(f) of the
Code) in effect at that time. The Company believes that no ownership change for
purposes of Section 382 occurred up to and including June 30, 1998.


                                        9




Item 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
        OF OPERATIONS

OVERVIEW

     The following discussion should be read in conjunction with the
Consolidated Financial Statements and notes thereto, contained elsewhere in this
document.

     InterDigital commenced operations in 1972 and until 1987 was primarily
engaged in research and development activities related to its TDMA wireless
digital communications technology. In 1986, InterDigital introduced the
UltraPhone system, a fixed digital wireless local loop telephone system
employing its patented and proprietary TDMA technology, which it began
installing in 1987. InterDigital's operations from 1987 through 1992 were
characterized by increasing revenues accompanied by significant operating
losses. In late 1992, InterDigital acquired by merger two related companies
whose business included research and development activities related to CDMA
wireless digital communications technology. Since that time, InterDigital has
invested substantial amounts in its B-CDMA development efforts. In 1997,
InterDigital and its alliance partners started to engage in pre-market planning
activities associated with their new B-CDMA-based wireless local loop products.
During 1997, InterDigital had approximately $1.1 million of sales related to
prototype TrueLink products and component sales to its alliance partners. These
sales included B-CDMA ASICS (Application Specific Integrated Circuits) and other
components sold for integration into the alliance partners' pre-production
products. In January 1998, InterDigital announced that it had restructured its
operations to more fully concentrate on the commercialization of its B-CDMA
technology. As part of that restructuring, InterDigital announced its plans to
curtail its level of spending relating to the re-engineering and next generation
development efforts on the UltraPhone system and is not currently pursuing
additional UltraPhone product redesign efforts, although the Company continues
to market the UltraPhone product to niche markets. In March 1998, InterDigital's
TrueLink system was unveiled for commercial launch at the CEBIT show.
InterDigital expects field trials of the TrueLink product to occur during 1998.

     In addition to its UltraPhone and B-CDMA business activities, in 1993,
InterDigital, together with ITC implemented a comprehensive license strategy
designed to capitalize upon the revenue potential of ITC's extensive TDMA and
CDMA patent portfolio. This strategy has resulted in the establishment of
strategic alliances with Siemens, Samsung and Alcatel and patent licenses with a
total of seventeen licensees through June 30, 1998. It resulted in license and
alliance revenues of over $180 million since 1993, including $52.7 million in
1998. Much of this success occurred in the first half of 1998. Through June 30,
1998, InterDigital entered into three new patent licenses with Sharp
Corporation, Kyocera Corporation and Toshiba Corporation for aggregate gross
payments of $48 million. Of this amount, InterDigital recognized $5.6 million in
the first quarter of 1998 and $42.4 million in the second quarter of 1998.
Additionally, in the first quarter of 1998, InterDigital entered into an
alliance with Alcatel, its third alliance partner, covering B-CDMA technology
development, CDMA patent licensing, trademark licensing, development, technology
transfer, standards support and other areas of cooperation. Despite these
successes, revenues from alliance partners and licensees have been, thus far,
primarily in the form of up-front, non-refundable payments. This coupled with
the fact that new license and/or alliance agreements are not entered into on a
regular, predictable basis have been major factors in the significant
fluctuations in the Company's revenues and operating results from quarter to
quarter. InterDigital expects the variability in licensing and alliance revenues
and, consequently, its cash flow to continue unless and until significant
recurring royalties are received under the applicable license and alliance
agreements.

Liquidity

     The Company had working capital of $47.4 million at June 30, 1998 compared
to working capital of $22.9 million at December 31, 1997. The increase in
working capital since December is due primarily to the receipt of $48 million of
cash from three new patent licensees in the first half of 1998.

     Demands on working capital in 1998 and beyond are expected to increase. The
Company expects to significantly increase its B-CDMA technology development
expenditures to commercialize, update and expand applications for its
technology. As the commercial development effort for the current product nears
completion, substantial additional expenditures are expected to be incurred for
marketing and other activities and subsequent, substantial additional
expenditures will be required to support later stage development. Marketing,
administrative, and other costs are expected to increase as well as the Company
seeks to more effectively support its alliance program. Further, the cost of
prosecuting patent applications worldwide, defending the validity of ITC's
patents, and litigating patent infringement actions related to ITC's patents can
be substantial.


                                       10




     The Company's working capital requirements will depend on numerous
additional factors, including but not limited to the success of furthering the
alliance strategy, the extent of the niche market and related margins for the
UltraPhone system, the ability to generate license fees and royalties, and the
need to expend funds in connection with its patent enforcement activities.

     The Company does not presently maintain bank lines of credit. The Company
is investigating and may, at some future date, find it desirable to obtain
additional debt or equity capitalization to fully support its technical and
product development and marketing activities and/or to fund its patent
enforcement activities. There can be no assurances that the Company will be able
to sell any such securities, or that it will be able to do so on terms favorable
to the Company.

     The Company believes that its investment in inventories and non-current
assets are stated on its December 31, 1997 and June 30, 1998 balance sheets at
realizable values based on expected selling price and order volumes. Property
and equipment are currently being utilized in the Company's on-going business
activities, and the Company believes that no additional write-downs are required
at this time due to lack of use or technological obsolescence. With respect to
other assets, the Company believes that the value of its patents is at least
equal to the value included in the December 31, 1997 and June 30, 1998 balance
sheets.

Backlog

     At June 30, 1998, the Company's backlog of orders for UltraPhone telephone
equipment and services was $342,000. At June 30, 1997, the Company's backlog of
orders for UltraPhone telephone equipment and services was $1.4 million.

Cash Flows and Financial Condition

     The Company has experienced positive cash flows of $26.6 million from
operations during the six months ended June 30, 1998. The positive cash flows
from operations are primarily due to the payments received from new licensees.

     The Company converted cash into short-term investments in the first half of
1998 resulting in negative cash flows from investment activities.
Notwithstanding the above, the amount of cash used in investing activities has,
historically, been low relative to cash used in operations.

     During the six month period ended June 30, 1998, the Company experienced
positive cash flows of $240,000 from financing. Proceeds from the exercise of
stock options and warrants and the sales of stock through the Company's Employee
Stock Purchase Plan were partially offset by payments on long-term debt
(including capital lease obligations).

     Cash, cash equivalents and short-term investments of $3.7 million as of
June 30, 1998 includes $139,000 of restricted cash. Accounts receivable of $3.0
million at June 30, 1998 reflect amounts due from normal trade receivables,
including non-domestic open accounts, as well as funds to be remitted under
letters of credit. Of the outstanding trade receivables as of June 30, 1998,
$250,750 has been collected through July 31, 1998.

     Net inventory levels at June 30, 1998 of $12.1 million have decreased as
compared to $12.3 million as of December 31, 1997. Inventories at December 31,
1997 and June 30, 1998 are stated net of valuation reserves of $5.8 million and
$9.3 million, respectively.

     Included in other accrued expenses at June 30, 1998 are professional fees,
consulting and other accruals as well as sales taxes payable.

RESULTS OF OPERATIONS

Second Quarter of 1998 Compared to the Second Quarter of 1997

Total Revenues. Total revenues in the second quarter ended June 30, 1998
increased to $46.4 million from $18.2 million in the second quarter ended June
30, 1997. The increase was primarily due to an increase in licensing revenue in
the second quarter of 1998 to $44.8 million from $1.8 million the comparable
quarter of 1997, partially offset by declining product sales.


                                       11




Cost of product sales. The cost of product sales for the second quarter of 1998
decreased to $5.0 million from $14.8 million for the second quarter of 1997 due
to the decrease in product revenues. The Company experienced a negative gross
margin on product revenue of 215.0% as compared to a positive gross margin of
10.2% for the quarter ended June 30, 1997 when manufacturing overhead expenses
were almost fully absorbed. Included in cost of product sales are costs of
product assembly, integration and testing, distributor commissions, freight and
tariffs, and expenses associated with installation, support and warranty
services. Also included in the cost of sales are increases in inventory reserves
and any manufacturing overhead expenses the Company has incurred that are not
absorbed into inventory based on low volume of production during the quarter.

Other Operating Expenses. Other operating expenses include sales and marketing
expenses, general and administrative expenses, patent services, and product
development expenses.

     Sales and marketing expenses decreased 53.4% to $987,000 during the second
quarter of 1998 as compared to $2.1 million during the second quarter of 1997.
The decrease is primarily due to decreased staff and activity levels, and
included a decrease in commission expense due to the decrease in UltraPhone
product revenues in the three month period of 1998.

     General and administrative expenses for the second quarter of 1998
decreased 38.9% to $1.6 million from $2.6 million for the second quarter of
1997. The decrease is primarily due to cost containment measures and the timing
of certain administrative expenses.

     Patents administration and licensing expenses increased 441% to $4.1
million during the second quarter of 1998 as compared to $755,000 during the
same period in 1997. The increase is due primarily to expenses related to new
patents and increased activity related to capitalizing the revenue potential of
InterDigital's extensive TDMA and CDMA patent portfolio.

     Product development expenses for the second quarter of 1997 decreased 40.8%
to $3.8 million during the first quarter of 1998 as compared to $6.5 million
during the second quarter of 1997. Staff and activity levels devoted to further
development of the TDMA technology decreased significantly. Expenses were also
affected by the timing of certain B-CDMA activities.

Other Income and Expense. Interest income for the second quarter of 1998 was
$648,000 as compared to $665,000 for the second quarter of 1997. The Company had
similar average invested cash balances in both periods. Interest expense for the
three month period ended June 30, 1998 was $97,000 as compared to $108,000 for
the three month period ended June 30, 1997. The decrease is due to lower
outstanding debt in the period.

Results of Operations - Six Months Ended June 30, 1998 Compared to Six Months
Ended June 30, 1997

Total Revenues. Total revenues for the six months ended June 30, 1998 increased
to 27.9% to $56.5 million from $44.2 million for the six months ended June 30,
1997 primarily due to an increase in the amount of licensing revenues partially
offset by a decrease in product revenues. Licensing and alliance revenues for
the six months ended June 30, 1998 include $2.6 million from Alcatel, $1.7
million from Samsung, $367,000 from recurring royalty licensing revenue and
$48.1 million in licensing revenue from new licensees. Licensing and alliance
revenues for the six months ended June 30, 1997 includes $1.4 million as part of
the Samsung Agreements, $1.6 million as part of the Siemens Agreements and
$947,000 of recurring royalty licensing revenue from one licensee.

Cost of Product Sales. The cost of Product sales for the six months ended June
30, 1998 decreased 78.6% to $7.6 million from $35.7 million for the six months
ended June 30, 1997. The Company incurred a negative gross margin on Product
sales of 103.1% for the six months ended June 30, 1998. Included in cost of
product sales are costs of product assembly, integration and testing,
distributor commissions, freight and tariffs, and expenses associated with
installation, support and warranty services related to product sales, as well as
increases in inventory reserves and the overhead expenses the Company has
incurred in maintaining its production resources that were not absorbed into
inventory due to the low volume of production. At low production levels, such as
those experienced in the first half of 1998, the Company incurs substantial
negative gross margins because production costs are spread over only a limited
number of units of production.

Other Operating Expenses. Other operating expenses include sales and marketing
expenses, general and administrative expenses, patent services, and product
development expenses.


                                       12




     Sales and marketing expenses decreased 51% to $2.1 million during the six
months ended June 30, 1998 compared to $4.2 million during the six months ended
June 30, 1997. The decrease is primarily due to decreased commissions expense,
commensurate with decreased UltraPhone product revenues and decreased activity
levels.

     General and administrative expenses for the six months ended June 30, 1998
decreased 31.3% to $3.3 million from $4.8 million for the six months ended June
30, 1997. The decrease in general and administrative expense is due primarily to
cost containment measures.

     Patents administration and licensing activities expense increased 242% in
the six months ended June 30, 1998 to $6.4 million compared to $1.9 million in
the first half of 1997. The Company has substantially increased its activities
supporting the licensing strategy to offer non-exclusive, royalty bearing
patent, technology and know-how and trademark licensees.

     Product development expenses decreased 39.4% for the six months ended June
30, 1998 to $7.7 million from $12.7 million for the six months ended June 30,
1997. The decrease over the prior year period is due primarily to decreased
staff and activity levels devoted to further development of the Company's
UltraPhone product and to timing of certain costs related to its B-CDMA
technology.

Other Income and Expense. Interest income for the six months ended June 30, 1998
and the six months ended June 30, 1997 was $1.0 million. Interest expense for
the six month period ended June 30, 1998 was $199,000 as compared to $228,000
for the six month period ended June 30, 1997. The decrease is due to lower
overall debt in the first half of 1998 as compared to the first half of 1997.

STATEMENT PURSUANT TO THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995

     The foregoing Management's Discussion and Analysis contains forward looking
statements reflecting, among other things, InterDigital's current beliefs and
expectations as to its working capital requirements, field tests, and receipt
of revenues from alliances and royalty payments. Words such as "intends",
"expects", and "believes", variations of such words, and words with similar
meaning or connotations are intended to identify such forward looking
statements.

     Such statements are subject to risks and uncertainties. InterDigital
cautions the readers that important factors in some cases have affected and, in
the future, could materially affect actual results and cause actual results to
differ materially from the results expressed in any such forward looking
statement. For example, working capital requirements may be affected by the
Company's ability to generate revenues, secure other sources of adequate capital
(or access thereto) to fund operations and to maintain capital, which in turn
may be affected by general economic and industry specific conditions, its
ability to successfully implement the alliance and the licensing programs, its
ability to successfully develop and commercialize product, and the costs related
to enforcement of its patent rights. Field tests could be impeded by the failure
or inability of persons with a business relationship with the Company to secure
required permits or frequencies or other things necessary to fulfill their
obligations to InterDigital. Receipt of expected revenues from alliances or
royalties could be affected by the failure to enter into additional strategic
alliances, the failure or inability of InterDigital's alliance partners to meet
InterDigital's expectations or contractual commitments, the failure of
InterDigital to successfully negotiate additional licensing agreements for its
patents and other intellectual property or to enforce its rights under its
license agreements; the outcomes under legal and administrative cases and
proceedings relating to InterDigital's assertion of its patents rights, the
inability or failure of InterDigital to protect its intellectual property
rights, and the inability to successfully prove infringement of its patents. In
addition, factors affecting one forward looking statement may affect other
forward looking statements and other factors may exist that are not listed above
or that are not fully known to InterDigital at this time. InterDigital
undertakes no obligation to publicly update any forward looking statements,
whether as a result of new information, future events or otherwise.


                                       13




PART II - OTHER INFORMATION

Item 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

     At the Company's Annual Meeting of Shareholders held on June 18, 1998, the
shareholders of the Company elected Mr. Robert S. Roath as a director of the
Company, ratified the appointment of Arthur Andersen LLP as the Company's
independent accountants for the year ending December 31, 1998, and authorized an
amendment to the Company's Certificate of Incorporation to increase the number
of authorized shares of Common Stock from 75,000,000 to 100,000,000, as set
forth in the Company's Proxy Statement dated May 11, 1998. The Company's
shareholders elected Mr. Roath as a director by a vote of 45,575,658 in favor,
and 1,364,574 withheld. Messrs. Harry G. Campagna, D. Ridgely Bolgiano, Steven
T. Clontz, Joseph S. Coleson, Jr., and William A. Doyle also continued to serve
their terms as directors. The vote ratifying the appointment of Arthur Andersen
LLP was 45,984,754 shares for, 856,984 shares against and 98,494 shares
abstaining. The vote approving the amendment to the Certificate of Incorporation
was 43,087,967 shares for, 3,567,118 shares against and 285,147 shares
abstaining. There were no broker non-votes with respect to ant matters voted on
at this Meeting.

Item 5. OTHER INFORMATION

        Discretionary Proxy Voting Authority/Shareholder Proposals

     On May 21, 1998 the Securities and Exchange Commission adopted an amendment
to Rule 14a-4, as promulgated under the Securities and Exchange Act of 1934. The
amendment to Rule 14a-4(c)(1) governs the Company's use of its discretionary
proxy voting authority with respect to a shareholder proposal which the
shareholder has not sought to include in the Company's proxy statement. The new
amendment provides that if a proponent of a proposal fails to notify the company
at least 45 days prior to the month and day of mailing of the prior year's proxy
statement, then the management proxies will be allowed to use their
discretionary voting authority when the proposal is raised at the meeting,
without any discussion of the matter in the proxy statement.

     With respect to the Company's 1999 Annual Meeting of Shareholders, if the
Company is not provided notice of a shareholder proposal, which the shareholder
has not previously sought to include in the Company's proxy statement, by March
29, 1999, the management proxies will be allowed to use their discretionary
authority as outlined above.

Item 6. EXHIBITS AND REPORTS ON FORM 8-K

     (a) The following is a list of exhibits filed as part of this Form 10-Q:

         Exhibit 3.1 Restated Articles of Incorporation dated as of June 26,
         1998.

         Exhibit 3.2 By-laws, as amended April 23, 1998.

         Exhibit 27 Financial Data Schedule.

     (b) The following is a list of Current Reports on Form 8-K filed during the
second quarter of 1998:

     The Company filed a Current Report on Form 8-K dated April 21, 1998 under
Item 5 - Other Events, relating to patent license agreements between the Company
and Sharp Corporation and the Company and Kyocera Corporation, respectively. No
financial statements were filed with this report.


                                       14




                                   SIGNATURES

     Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.

                                        INTERDIGITAL COMMUNICATIONS CORPORATION



Date: August 12, 1998                   /s/ William A. Doyle
                                            -----------------------------------
                                            William A. Doyle, President


Date: August 12, 1998                   /s/ Loretta P. Brehony
                                            -----------------------------------
                                            Loretta P. Brehony, Controller
                                            and Principal Accounting Officer


                                       15