Exhibit 99.1

   InterDigital Announces Fourth Quarter and Full Year 2006 Financial Results

        Strong Full Year Profitability and Cash Flow Driven by Growth in
                     Recurring Royalties and Nokia Revenues

          Company Projects First Quarter 2007 Recurring Revenue of $53
                             million to $55 million


    KING OF PRUSSIA, Pa.--(BUSINESS WIRE)--Feb. 28, 2007--InterDigital
Communications Corporation (NASDAQ:IDCC) today announced results for
the fourth quarter and twelve months ended December 31, 2006.

    Highlights: Fourth Quarter 2006

    --  Revenue of $65.1 million, including $50.2 million of recurring
        revenue

    --  Net income of $20.3 million, or $0.37 per diluted share

    --  Repurchase of 1.3 million shares of the company's common stock
        for $42.4 million

    Highlights: Full Year 2006

    --  Revenue of $480.5 million, including $213.1 million of
        recurring revenue

    --  Net income of $225.2 million, or $4.04 per diluted share

    --  Repurchase of 6.5 million shares of the company's common stock
        for $192.5 million

    --  Free cash flow(1) of $282.2 million

    --  Ending cash and short-term investments totaling $264.0 million

    William J. Merritt, President and Chief Executive Officer, stated,
"2006 was a very successful year for InterDigital. Highlights included
signing a new 2G/3G agreement with a leading handset producer, LG
Electronics Inc. (LG), and our transition from providing portions of
3G IP to delivering a full 2G/3G dual-mode modem ASIC and platform. We
also continued our technology leadership as evidenced by our agreement
with SK Telecom to develop advanced mobility technology. At the same
time, we used our substantial free cash flow to support investments in
attractive business opportunities and to repurchase our own stock.
Finally, we favorably resolved a dispute involving a patent license
agreement with Nokia and received a very beneficial ruling in the
Samsung arbitration."

    Mr. Merritt added, "In 2007, we expect to build on the successes
of 2006 and further enhance shareholder value. This year, we
anticipate growing our base of 3G patent licensees and completing a
dual-mode 2G/3G HSDPA/HSUPA modem ASIC on schedule which will position
us for a design win and initial product sales in 2008. We will also
continue our successful contributions to the evolving wireless
standards, including Long-Term Evolution. Finally, we will take
measured steps toward optimizing our capital structure and continue
our share repurchase program. We have already made additional share
repurchases of 2.0 million shares for $68.0 million in 2007. This
brings our total repurchases as of February 27, 2007 to 8.5 million
shares, for a total cost of approximately $260.5 million."

    Fourth Quarter Summary

    Revenue in fourth quarter 2006 increased to $65.1 million from
$40.5 million in fourth quarter 2005. Fourth quarter 2006 revenue
included $50.2 million of recurring patent license royalties and
technology solution sales, $12.5 million related to Nokia, and $2.4
million associated with past sales for both a new and existing
licensee. Recurring patent license royalties in fourth quarter 2006
increased 33 percent to $48.2 million from $36.2 million in fourth
quarter 2005 due largely to a new agreement signed in early 2006 with
LG. Technology solution revenue decreased to $2.0 million in fourth
quarter 2006 from $4.3 million in fourth quarter 2005 due to the
completion in first quarter 2006 of deliverables under an agreement
with General Dynamics supporting a program for the U.S. military.
Licensees that accounted for 10 percent or more of the $50.2 million
of recurring patent license royalties and technology solution sales
were LG (29 percent), Sharp Corporation of Japan (17 percent), and NEC
Corporation of Japan (15 percent).

    The company's net income in fourth quarter 2006 was $20.3 million,
or $0.37 per diluted share. Included in fourth quarter 2006 net income
is approximately $8.1 million after tax, or $0.15 per diluted share,
related to the resolution of patent licensing matters with Nokia.
Fourth quarter 2005 net income of $45.0 million, or $0.80 per diluted
share, included a non-recurring income tax benefit of approximately
$43.7 million, or $0.76 per diluted share, mainly related to the
reversal of the company's valuation allowance against its federal
deferred tax assets.

    Fourth quarter 2006 operating expenses of $38.4 million decreased
1 percent when compared to fourth quarter 2005. This decrease
primarily resulted from lower long-term compensation program costs
offset, in part, by increases in fourth quarter 2006 costs related to
product development initiatives and arbitration and litigation
matters. The company's long-term compensation costs in fourth quarter
2006 decreased $4.8 million from fourth quarter 2005, reflecting the
absence of overlapping cycles. Patent litigation and arbitration costs
increased to $8.5 million in fourth quarter 2006 from $7.5 million in
fourth quarter 2005 due to an increase in activity levels. In
addition, the company recognized $0.6 million of repositioning charges
in fourth quarter 2005.

    Net interest and investment income of $3.7 million in fourth
quarter 2006 increased $2.8 million over fourth quarter 2005 due to
both higher investment balances and higher rates of return in fourth
quarter 2006.

    The company's fourth quarter 2006 tax expense included a 35
percent provision and tax credit adjustments. The company's fourth
quarter 2005 tax provision included the $43.7 million of non-recurring
income tax benefits offset, in part, by $1.1 million of federal income
taxes and non-U.S. withholding taxes.

    During fourth quarter 2006, the company used $12.4 million of free
cash flow due largely to investments in product and patent related
initiatives, offset in part by cash collections related to patent
license agreements.

    Twelve Months Summary

    For the full year 2006, revenues were $480.5 million compared to
$163.1 million in 2005. This increase was driven by $253.0 million and
$12.0 million related to the resolution of matters with Nokia and
Panasonic, respectively, a new agreement signed in early 2006 with LG,
and higher contributions from other existing patent licensees,
including Panasonic.

    Net income for the full year 2006 increased to $225.2 million, or
$4.04 per diluted share, from $54.7 million, or $0.96 per diluted
share, for the full year 2005. Approximately $170.3 million or $3.05
per diluted share of the 2006 net income is related to the resolution
of patent licensing matters with Nokia and Panasonic. Included in full
year 2005 net income is a non-recurring income tax benefit of
approximately $43.7 million, or $0.76 per diluted share, mainly
related to the reversal of the company's valuation allowance against
its federal deferred tax assets.

    Operating expenses of $144.1 million in 2006 decreased 1 percent
versus 2005. This decrease is primarily related to lower costs
associated with patent litigation and arbitration ($21.4 million in
2006 compared to $27.3 million in 2005), long-term compensation, and
executive severance and repositioning activities offset, in part, by
higher costs associated with product development initiatives, patent
maintenance and amortization costs, and commissions.

    In 2006, net interest and investment income of $13.2 million
increased $10.0 million over 2005 due to both higher investment
balances and higher rates of return in 2006.

    The company's full year 2006 tax expense consisted of an
approximately 35 percent provision for federal income taxes plus $2.2
million of non-U.S. withholding taxes. The full year 2005 tax
provision included the $43.7 million of non-recurring income tax
benefits offset, in part, by $7.2 million of federal income tax and
alternative minimum tax and $2.1 million of non-U.S. source
withholding tax.

    In 2006, the company generated $282.2 million of free cash flow.
This free cash flow was driven, in large part, by patent license
payments from Nokia and LG totaling $319.7 million, net of source
withholding taxes, offset, in part, by estimated federal tax payments
and investments in product and patent related initiatives.

    First Quarter 2007 Outlook

    Rich Fagan, Chief Financial Officer commented, "In first quarter
2007, we expect to report recurring revenues from existing agreements
of $53 million to $55 million. We currently expect sequential
percentage growth in first quarter 2007 expenses to be in the
mid-teens, excluding patent arbitration and litigation costs. The
majority of this increase is structural in nature, reflecting normal
wage inflation, seasonality related to vacation accruals and other
personnel costs, and the effect of overlapping long-term compensation
program RSU cycles. In addition, we anticipate modest increases
related to investments directed toward meeting our schedule to have
engineering samples of our 2G/3G ASIC by late summer 2007. We also
currently expect that our patent arbitration and litigation costs in
first quarter 2007 will be between $6 million and $8 million as we
continue to invest appropriately in this critical activity. Lastly, we
expect that our book tax rate for the first quarter of 2007 will
approximate 35 percent to 37 percent."

    About InterDigital

    InterDigital Communications Corporation designs, develops and
provides advanced wireless technologies and products that drive voice
and data communications. InterDigital is a leading contributor to the
global wireless standards and holds a strong portfolio of patented
technologies which it licenses to manufacturers of 2G, 2.5G, 3G and
802 products worldwide. Additionally, the Company offers baseband
product solutions and protocol software for 3G multimode terminals and
converged devices. InterDigital's differentiated technology and
product solutions deliver time-to-market, performance and cost
benefits. For more information, please visit InterDigital's web site:
www.interdigital.com. InterDigital is a registered trademark of
InterDigital.

    This press release contains forward-looking statements regarding
our current beliefs, plans, and expectations with respect to our plans
for 2007 including growing our base of 3G licensees, completing a dual
mode modem ASIC on schedule, making successful contributions to
standards, continuing the share repurchase program and optimizing our
capital structure; our expected first quarter 2007 recurring revenues
and growth in operating expenses (excluding patent arbitration and
litigation costs); timing of engineering samples of our dual mode
modem ASIC; and first quarter 2007 patent arbitration and litigation
costs and book tax rate. Words such as "optimistic," "will," "expect,"
"anticipate" or similar expressions are intended to identify such
forward-looking statements.

    Forward-looking statements are subject to risks and uncertainties,
and actual outcomes could differ materially from those expressed in or
anticipated by such forward-looking statements due to a variety of
factors including those identified in this press release as well as
the following: (i) unanticipated delays, difficulties or acceleration
in the execution of patent license agreements; (ii) our ability to
leverage our strategic relationships and secure new relationships on
acceptable terms; (iii) changes in the market share and sales
performance of our primary licensees, delays in product shipments of
our licensees, and any delay in receipt of quarterly royalty reports
from our licensees; (iv) changes in expenses related to our technology
offerings and operations; (v) potential difficulties in the production
of ASIC samples; (vi) changes in the technology preferences or needs
or in the availability of competitive technologies; (vii) fluctuations
in our stock price; (viii) the resolution of current legal
proceedings, additional legal proceedings, changes in the schedules or
costs associated with legal proceedings, or adverse rulings in such
legal proceedings; and (ix) changes in our expectations of the amount
and composition of full-year taxable income, changes in foreign and
domestic tax laws or treatises, or changes in our tax planning
strategies. We undertake no duty to publicly update any
forward-looking statements, whether as a result of new information,
future events or otherwise, except as may be required by applicable
law, regulation or other competent legal authority.

    (1) InterDigital defines "free cash flow" as operating cash flow
less purchases of property and equipment, technology licenses, and
investments in patents. A detailed reconciliation of free cash flow to
GAAP results is provided at the end of this news release.


             SUMMARY CONSOLIDATED STATEMENT OF OPERATIONS
- ----------------------------------------------------------------------
                  For the Periods Ended December 31
             (Dollars in thousands except per share data)
                             (unaudited)


                                 For the Three       For the Twelve
                                  Months Ended        Months Ended
                                  December 31,        December 31,
                               ---------------------------------------
                                 2006      2005      2006      2005
                               ---------------------------------------
REVENUES                        $65,068   $40,489  $480,466  $163,125
                               --------- --------- --------- ---------

OPERATING EXPENSES:
  Sales and marketing             1,554     2,299     6,610     7,914
  General and administrative      5,192     6,252    20,953    24,150
  Patents administration and
   licensing                     14,975    13,377    51,060    49,399
  Development                    16,725    16,391    65,427    63,095
  Repositioning                       -       631         -     1,480
                               --------- --------- --------- ---------
                                 38,446    38,950   144,050   146,038
                               --------- --------- --------- ---------

  Income from operations         26,622     1,539   336,416    17,087

NET INTEREST & OTHER INVESTMENT
 INCOME                           3,691       918    13,195     3,164
                               --------- --------- --------- ---------

  Income before income taxes     30,313     2,457   349,611    20,251

INCOME TAX PROVISION            (10,050)   42,573  (124,389)   34,434
                               --------- --------- --------- ---------

NET INCOME APPLICABLE TO COMMON
 SHAREHOLDERS                   $20,263   $45,030  $225,222   $54,685
                               ========= ========= ========= =========

NET INCOME PER COMMON SHARE -
 BASIC                            $0.39     $0.83     $4.22     $1.01
                               ========= ========= ========= =========

WEIGHTED AVERAGE NUMBER OF
 COMMON SHARES OUTSTANDING -
 BASIC                           52,352    53,943    53,426    54,058
                               ========= ========= ========= =========

NET INCOME PER COMMON SHARE -
 DILUTED                          $0.37     $0.80     $4.04     $0.96
                               ========= ========= ========= =========

WEIGHTED AVERAGE NUMBER OF
 COMMON SHARES OUTSTANDING -
 DILUTED                         54,558    56,370    55,778    57,161
                               ========= ========= ========= =========


                          SUMMARY CASH FLOW
- ----------------------------------------------------------------------
                  For the Periods Ended December 31
                        (Dollars in thousands)
                             (unaudited)

                           For the Three Months  For the Twelve Months
                                   Ended                 Ended
                               December 31,          December 31,
                           --------------------- ---------------------
                             2006       2005       2006       2005
                           --------------------- ---------------------

Net income before income
 taxes                       $30,313     $2,457   $349,611    $20,251
Taxes paid                         -          -    (51,488)      (755)
Depreciation & amortization    5,661      5,104     21,635     21,187
Increase in deferred
 revenue                      35,626     11,500    336,650     57,605
Deferred revenue recognized  (48,178)   (21,906)  (196,294)   (65,553)
(Decrease) increase in
 operating working capital,
 deferred charges and other  (24,457)    (1,083)  (145,213)       921
Capital spending,
 technology licensing &
 patent additions            (11,335)    (5,777)   (32,717)   (22,326)
                           ---------- ---------- ---------- ----------
  FREE CASH FLOW             (12,370)    (9,705)   282,184     11,330

Net asset disposal
 (acquisition) of fixed
 asset                             -        169          -     (7,881)
Tax benefit from stock
 options                       2,296          -     20,717          -
Debt decrease                    (91)       (84)      (351)      (327)
Repurchase of common stock   (34,766)         -   (184,870)   (34,085)
Proceeds from exercise of
 stock options                 4,721      1,101     40,578      4,853
                           ---------- ---------- ---------- ----------
  NET (DECREASE) INCREASE
   IN CASH AND SHORT-TERM
   INVESTMENTS              $(40,210)   $(8,519)  $158,258   $(26,110)
                           ========== ========== ========== ==========

                       CONDENSED BALANCE SHEET
- ----------------------------------------------------------------------
                        (Dollars in thousands)
                             (unaudited)

                                             December 31, December 31,
                                                 2006         2005
                                             ------------ ------------
Assets
- ---------------------------------------------
Cash & short-term investments                   $263,966     $105,708
Accounts receivable                              131,852       19,534
Current deferred tax assets                       43,520       42,103
Other current assets                              14,464        8,370
Property & equipment and Patents (net)            87,178       70,176
Long-term deferred tax assets and non-current
 assets                                           23,096       53,646
                                             ------------ ------------
TOTAL ASSETS                                    $564,076     $299,537
                                             ============ ============

Liabilities and Shareholders' Equity
- ---------------------------------------------
Current portion of long-term debt               $    369     $    350
Accounts payable & accrued liabilities            50,150       30,129
Current deferred revenue                          70,709       20,055
Long-term deferred revenue                       160,895       71,193
Long-term debt & long-term liabilities             6,477        3,496
                                             ------------ ------------
TOTAL LIABILITIES                                288,600      125,223

SHAREHOLDERS' EQUITY                             275,476      174,314
                                             ------------ ------------

TOTAL LIABILITIES & SHAREHOLDERS' EQUITY        $564,076     $299,537
                                             ============ ============

    The company's short-term investments are comprised of high quality
credit instruments including U.S. Government agency instruments and
corporate bonds. Management views these instruments to be near
equivalents to cash and believes that investors may share this
viewpoint.

    This release includes a summary cash flow statement that results
in the change in both the company's cash and short-term investment
balances. One of the subtotals in the summary cash flow statement is
free cash flow. The table below presents a reconciliation of this
non-GAAP line item to net cash provided by operating activities.

                                 For the Three       For the Twelve
                                  Months Ended        Months Ended
                                   December 31,        December 31,
                               ------------------- -------------------
                                 2006      2005      2006      2005
                               ------------------- -------------------

Net cash provided by operating
 activities                     $(1,031)  $(3,959) $314,811   $33,674
Purchases of property,
 equipment, & technology
 licenses                        (6,523)   (1,366)  (13,852)   (5,372)
Patent additions                 (4,812)   (4,411)  (18,865)  (16,954)
Unrealized (loss) gain on short
 term investments                    (4)       31        90       (18)
                               --------- --------- --------- ---------
Free cash flow                 $(12,370)  $(9,705) $282,184   $11,330
                               ========= ========= ========= =========

    InterDigital is a registered trademark of InterDigital
Communications Corporation.


    CONTACT: InterDigital Communications Corporation
             Media Contact:
             Jack Indekeu, 610-878-7800
             jack.indekeu@interdigital.com
             or
             Investor Contact:
             Janet Point, 610-878-7800
             janet.point@interdigital.com