(July 13, 2017, 8:27 AM EDT) -- WASHINGTON, D.C. — A patent challenger recently told the Federal Circuit U.S. Court of Appeals that the Patent Trial and Appeal Board “violated a basic tenet of patent law” in turning away allegations of obviousness presented in a petition for inter partes review (IPR) (Ericsson Inc. v. Intellectual Ventures I LLC, No. 17-1521, Fed. Cir.)....