Mentor Graphics v. Synopsys: Affirmed-in-Part, Reversed-in-Part, Vacated-in-Part, and Remanded
Various Synopsys parties and EVE-USA, Inc. (collectively “Synopsys”) sued Mentor Graphics, seeking a declaration that Mentor’s ’376, ’531, and ’176 patents were invalid and not infringed. Mentor counterclaimed for willful infringement of those three patents, and also asserted infringement of two more (the ’526 and ’109 patents). The court consolidated the case with another involving a fourth patent owned by Mentor (the ’882 patent)… A jury does not have to further apportion lost profits to patented features of a larger product after applying the Panduit factors, which implicitly incorporate apportionment into the lost profit award. Claim preclusion applies when a claim was asserted, or could have been asserted, in a prior action. It does not bar allegations that did not exist at the time of the earlier action.