( May 20, 2025, 11:47 AM EDT) -- WASHINGTON, D.C. — A split Federal Circuit U.S. Court of Appeals panel on May 19 held that the U.S. Patent Trial and Appeal Board (PTAB) should have gone further in its findings that challenged claims in patents related to a device to be used with a stylus were unpatentable as obvious, reversing the PTAB’s findings related to one patent claim and affirming regarding multiple others....