The U.S. Patent and Trademark Office has invalidated software patent claims that TiVo Inc. used to win $200 million in sanctions and infringement damages against EchoStar Corp., but TiVo is digging in to continue the legal fight.
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PTO invalidates TiVo patent claims, but case against EchoStar is far from over
The National Law Journal
June 9, 2010
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