(May 6, 2024, 1:24 PM EDT) -- WASHINGTON, D.C. — The Federal Circuit U.S. Court of Appeals on May 3 upheld a determination by the Patent Trial and Appeal Board that the vast majority of challenged claims in three patents directed to a tunneling client access point are unpatentable but said six claims in two of those same patents were wrongly deemed anticipated, following the board’s erroneous application of the printed matter doctrine....