EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We  hereby  consent  to the  incorporation  by  reference  in  the  Registration
Statements  on Form S-8  (File No.  333-66626)  of  InterDigital  Communications
Corporation  of our  report  dated  May  27,  2005  relating  to  the  financial
statements and  supplemental  schedules of  InterDigital  Communications,  Corp.
Savings and  Protection  Plan, for the year ended December 31, 2004 which appear
in this Form 11-K


/s/Cogen Sklar LLP
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Bala Cynwyd, Pennsylvania
June 28, 2005


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