InterDigital recently failed to revive the patent-infringement claims against Microsoft. U.S. Court of Appeals for the Federal Circuit said that four InterDigital patents weren’t infringed and a fifth is invalid. The court upheld a decision by the U.S. International Trade Commission, which rejected InterDigital’s bid to block phones made by Microsoft.
InterDigital relies on licensing its technology that lets mobile phones transmit information quicker as its sole revenue source. The Wilmington, Delaware-based company is counting on this and other patent cases to force ZTE and Microsoft to pay royalties. The dispute is over patents covering ways to improve transmissions without using too much power.