Mealey's (April 11, 2019, 12:14 PM EDT) -- WASHINGTON, D.C. — In an April 8 cross-appellant brief, a patent owner asserts that the Patent Trial and Appeal Board lacks the statutory authority to declare patent claims indefinite in an inter partes review (IPR) (Samsung Electronics America Inc. v. Prisua Engineering Corp., Nos. 19-1169, -1260, Fed. Cir.)....