Mealey's (April 10, 2020, 1:29 PM EDT) -- CHICAGO — An Illinois federal judge did not err in declaring invalid as functional a claimed trade dress consisting of a beveled concave curve of the leading edge of a conveyor belt fastener, the Seventh Circuit U.S. Court of Appeals ruled April 7 (Flexible Steel Lacing Co. v. Conveyor Accessories Inc., No. 19-2035, 7th Cir., 2020 U.S. App. LEXIS 10835)....