Mealey's (September 14, 2022, 12:48 PM EDT) -- WASHINGTON, D.C. — In two briefs filed Sept. 9, a prevailing petitioner for inter partes review (IPR) and the U.S. Patent and Trademark Office (PTO) tell the Federal Circuit U.S. Court of Appeals that a patent owner’s challenge to findings of obviousness by the Patent Trial and Appeal Board lacks merit....