Power Integrations, Inc. v. Lee, No. 14-1123 (Fed. Cir. 2015)
Annotate this CasePower Integrations’ 876 patent is entitled “Frequency Jittering Control for Varying the Switching Frequency of a Power Supply.” It is directed to a technique for reducing electromagnetic interference by jittering the switching frequency of a switched mode power supply. The Board of Patent Appeals and Interferences affirmed rejection of claims 1, 17, 18, and 19 as anticipated under 35 U.S.C. 102(b). The Federal Circuit vacated, noting previous litigation concerning the claims. The board fundamentally misconstrued Power Integrations’ principal claim construction argument and failed to provide a full and reasoned explanation of its decision to reject claim 1. While the board is not generally bound by a previous judicial interpretation of a disputed claim term, the board erred in failing to address the district court’s previous interpretation of the term “coupled.”
The court issued a subsequent related opinion or order on August 31, 2015.
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