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INTERDIGITAL TECHNOLOGY FILES SUIT AGAINST ERICSSON FOR TDMA PATENT INFRINGEMENT

 KING OF PRUSSIA, Pa., Sept. 9 /PRNewswire/ -- InterDigital Technology Corporation (InterDigital Technology), a subsidiary of InterDigital Communications Corporation (AMEX: IDC), filed suit today, in the U.S. District Court for the Eastern District of Virginia, against Ericsson GE Mobile Communications Inc. and Telefonaktiebolaget LM Ericsson for infringement of its U.S. Patents 4,675,863; 4,779,262; 4,785,450; 4,912,705; 4,817,089; 5,022,024; 5,119,375; and 5,121,291 (InterDigital Patents).
 InterDigital Technology has asserted that the InterDigital Patents cover Ericsson wireless digital telephone systems and infrastructure equipment, using a Time Division Multiple Access (TDMA)-based architecture, and TDMA subscriber units. The Eastern District of Virginia has a "rocket docket," which should enable the case to go to trial within about five months.
 The lawsuit asserts that infrastructure equipment and subscriber units manufactured, sold and used by Ericsson infringe the InterDigital Patents.
 In the lawsuit, InterDigital Technology seeks a preliminary injunction and a permanent injunction against continued infringement of its patents, as well as compensatory and treble damages, interest, attorneys' fees and expenses.
 This is the second lawsuit InterDigital Technology has filed to enforce its patents, which InterDigital Technology believes are fundamental to the U.S. Digital Cellular Standard, IS-54. On April 16, 1993, InterDigital technology sued OKI America, Inc. and OKI Electric Industry Company, Ltd. for a declaratory judgment that TDMA subscriber units to be manufactured, used and sold by them will infringe some of the InterDigital patents.
 President of InterDigital Technology Robert S. Bramson said, "We have studied our patents carefully and believe them to be strong and comprehensive. We are willing to grant reasonable royalty-bearing, non- exclusive licenses under our patents to interested parties, but we will take all necessary steps to enforce our patent rights. We had been negotiating actively with Ericsson for about six months but were unable to reach an agreement."
 InterDigital is represented in the lawsuit by the Washington-based law firm of Dickstein, Shapiro & Morin.
 /delval/
 -0- 9/9/93
 /CONTACT: Dave Buckingham of InterDigital Communications, 215-278-7910/
 (IDC)


CO: InterDigital Communications Corporation; InterDigital Technology
 Corporation; Ericsson GE Mobile Communications Inc. ST: Pennsylvania, Virginia IN: TLS SU:


CC-MJ -- PH013 -- 0441 09/09/93 15:57 EDT
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Publication:PR Newswire
Date:Sep 9, 1993
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