(September 11, 2023, 10:56 AM EDT) -- WASHINGTON, D.C. — The Federal Circuit U.S. Court of Appeals has been asked by a group of appellants in the telecommunications industry to reverse and remand the Patent Trial and Appeal Board’s determination that various substitute claims in a patented system and apparatus relating to “handshaking” in a cellular network are not anticipated or rendered obvious by the same prior art that invalidated the original claims....