Exhibit 99.1


              InterDigital Expects Strong First Quarter
   2004 Financial Results; Company Expects to Substantially Exceed
                    Financial Analysts' Estimates

    KING OF PRUSSIA, Pa.--(BUSINESS WIRE)--April 30,
2004--InterDigital Communications Corporation (Nasdaq:IDCC), a leading
architect, designer and provider of wireless technology and product
platforms, today announced that it expects to report financial results
for its first quarter 2004 that exceed financial analysts'
expectations due to higher than anticipated royalty revenue from NEC
Corporation of Japan (NEC) and continued solid performance from other
major licensees. A portion of NEC's royalties relate to 3G handset
shipments that were delayed from calendar fourth quarter 2003 to
calendar first quarter 2004 upon NEC's resolution of software and
interoperability issues. Based upon certain preliminary and final
royalty reports received to date from all principal licensees and
Company estimates, the Company expects to report revenue for first
quarter 2004 in the range of $31 million to $32 million, operating
expenses of approximately $25 million and net income per diluted share
in the range of $0.06 to $0.08 per share.
    InterDigital plans to report final results for its first quarter
2004 on May 10, 2004 before the market opens.

    About InterDigital

    InterDigital architects, designs and provides advanced wireless
technologies and products that drive voice and data communications.
The Company offers technology and product solutions for mainstream
wireless applications that deliver cost and time-to-market advantages
for its customers. InterDigital has a strong portfolio of patented
technologies covering 2G, 2.5G and 3G standards, which it licenses
worldwide. For more information, please visit InterDigital's web site:
www.interdigital.com. InterDigital is a registered trademark of
InterDigital Communications Corporation.

    This press release contains forward-looking statements as to the
Company's expectations for financial results for first quarter 2004.
Forward-looking statements are subject to risks and uncertainties.
Actual outcomes could differ materially from those expressed in any
such forward-looking statements due to a variety of factors including,
but not limited to: (i) adjustments made by licensees to preliminary
reported royalties; (ii) adjustments to the Company's revenue
estimates related to royalties from licensees which have not provided
reports as of this date; and (iii) final adjustments to operating
expense estimates made by the Company.

    CONTACT: InterDigital Communications Corporation
             Media Contact:
             Dawn Goldstein, 610-878-7800
             e-mail: dawn.goldstein@interdigital.com
             or
             Investor Contact:
             Janet Point, 610-878-7800
             e-mail: janet.point@interdigital.com