(May 29, 2019, 12:12 PM EDT) -- WASHINGTON, D.C. — An order by the Patent Trial and Appeal Board that instituted inter partes review (IPR) with regard to one patent claim it previously declined to review, and a subsequent finding that the claim is unpatentable, “cannot stand” because the patent owner was denied an opportunity to file a patent owner response (POR), an appellant told the Federal Circuit U.S. Court of Appeals on May 24 (Polaris Innovations Ltd. v. Kingston Technology Co. Inc., No. 19-1202, Fed. Cir.)....