Mealey's (March 24, 2021, 12:07 PM EDT) -- WASHINGTON, D.C. — The Patent Trial and Appeal Board erred in canceling 18 claims of a patent directed to an improved wireless mesh network because it construed portions of the preambles of three independent claims as not limiting, the patent owner asserts in a March 22 appellant brief filed with the Federal Circuit U.S. Court of Appeals....