(October 14, 2021, 11:57 AM EDT) -- WASHINGTON, D.C. — In a dispute over various patents that have since expired, an infringement defendant maintains in an Oct. 13 appellee brief filed with the Federal Circuit U.S. Court of Appeals that the method of maintaining “crowd control” in a virtual network recited in the claims was correctly deemed ineligible for patenting under Section 101 of the Patent Act by a Massachusetts federal judge....