(April 15, 2016, 10:28 AM EDT) -- ATLANTA — In an appeal over a denied motion to modify an injunction, an owner of a trademark for devices to treat back problems tells the 11th Circuit U.S. Court of Appeals in an on April 6 brief that the defendants waived the defense of trademark abandonment and are barred from relying on events that occurred prior to the injunction ruling (Axiom Worldwide, Inc. v. Excite Medical Corp. and Saleem N. Musallam, No. 15-15428, 11th Cir.)....