Addressing whether the Patent Trial and Appeal Board (PTAB or Board) too narrowly read its rules limiting reply briefs in an inter partes review (IPR) to preclude a petitioner’s argument as a “new theory of unpatentability,” the US Court of Appeals for the Federal Circuit concluded that the Board abused its discretion by not considering petitioner’s arguments. Apple Inc. v. Andrea Electronics Corp., Case Nos. 18-2382, -2383 (Fed. Cir. Feb. 7, 2020) (Plager, J.).