Mealey's (July 10, 2019, 2:32 PM EDT) -- WASHINGTON, D.C. — In a June 17 intervenor brief filed in the Federal Circuit U.S. Court of Appeals, the federal government defends the constitutionality of the practice by the U.S. Patent and Trademark Office (USPTO) of conducting inter partes reviews (IPRs) of patents issued before Congress authorized the procedure by statute (Collabo Innovations Inc. v. Sony Corporation, No. 19-1152, Fed. Cir.)....