Mealey's (February 19, 2019, 2:12 PM EST) -- WASHINGTON, D.C. — In oral arguments at the U.S. Supreme Court on Feb. 19, the U.S. Postal Service (USPS) defended the right of governmental agencies to levy challenges before the Patent Trial and Appeal Board (Return Mail Inc. v. U.S. Postal Service, et al., No. 17-1594, U.S. Sup.)....