Mealey's (September 18, 2020, 9:52 AM EDT) -- WASHINGTON, D.C. — In a Sept. 4 response and cross-appellant brief, a petitioner for inter partes review (IPR) with the Federal Circuit U.S. Court of Appeals asserts that the Patent Trial and Appeal Board correctly deemed obvious challenged claims of a patent but erred in granting the patent owner leave to amend in order to add substitute claims (Zaxcom Inc. v. Lectrosonics Inc., Nos. 2020-1350, -1405, Fed. Cir.)....