In IPR2012-00041, the Patent Trial and Appeals Board (“PTAB”) (A.P.J.s Medley, Blankenship and Bisk) issued an order in Synopsys, Inc. (“Petitioner”) v. Mentor Graphics Corporation (“Patent Owner”) denying Synopsys’ petition. In its petition, Synopsys sought review of U.S. Patent No. 6,947,882 relating to systems for emulating integrated circuit designs. Synopsys argued that claims 1-14, 17-20 were anticipated and/or rendered obvious based on four prior art U.S. patents, one of which was incorporated by reference into one of the other three patents. Notably, the ‘882 patent is involved in concurrent litigation with a Markman hearing set for July 23, 2013 and a jury trial set for June 16, 2014.
In declining to institute an inter partes review of any of the challenged claims on any of the proposed grounds, the Board agreed with the Petitioner that the claims terms should be given their ordinary meaning, except for a single claim limitation. The exception, however, relates to the claim term “wherein clocking of the second time multiplexed interconnection is independent of clocking of the first time multiplexed interconnection.” About this term, the Board stated that the Petitioner implicitly asserts that the independent clock signal limitation encompasses asynchronous clock signals originating from a single clock. As explained below, however, the Board’s construction of this term in a manner different that the Petitioner’s implied definition turned out to be fatal to Synopsys’ petition for inter partes review.
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