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Posts Tagged: "Cisco Sys. v. Cirrex Sys."

Cisco Successfully Invalidates Patent for Lack of Written Description

Cisco challenged Cirrex’s patent via inter partes reexamination, asserting a lack of written description. The Board affirmed the Examiner’s findings, that the patent, as amended, contained both patentable and unpatentable claims. On appeal, the Federal Circuit affirmed in part and reversed in part, holding that all of the claims are unpatentable for lack of written description.