The Court of Appeals for the Federal Circuit affirmed the Patent Trial and Appeal Board's determination that claims 7-9 are indefinite because the specification lacks a corresponding structure for a means-plus-function element, and remanded the Board's decision regarding claim 10. Regarding the limitation "directivity means comprising at least one directivity dependent microphone and/or signal processing means in the electronic circuitry" in Claim 10 which creates three alter

The Federal Circuit held that the Patent Trial and Appeal Board (PTAB) is not permitted to cancel claims on the grounds of indefiniteness in an inter partes review proceeding. However, even if certain claims are found to be indefinite, the PTAB may still rule on the patentability of the indefinite claims under 35 U.S.C. 102 and 103. Also, the term "digital processing unit" is not a means-plus-function limitation subject to analysis under 35 U.S.C. 112, paragraph 6. The cour