( May 29, 2026, 11:19 AM EDT) -- WASHINGTON, D.C. — The U.S. Patent Trial and Appeal Board (PTAB) wrongly concluded that a technology company’s technical expert’s testimony was conclusory and unsupported while considering inter partes review (IPR) proceedings the company initiated challenging another entity’s patent describing a digital educational content delivery system, a Federal Circuit U.S. Court of Appeals panel held in a May 28 opinion....