Mealey's (December 4, 2019, 1:03 PM EST) -- PITTSBURGH — A trademark infringement counterclaimant on Dec. 3 won a preliminary injunction barring a false advertising plaintiff from prosecuting a petition to cancel “The Big Switch” and “Big Switch” trademarks with the U.S. Patent and Trademark Office (USPTO) (Mazcon v. BEG Group LLC, et al., No. 19-40, W.D. Pa., 2019 U.S. Dist. LEXIS 207942)....