Mealey's (January 25, 2019, 11:59 AM EST) -- WASHINGTON, D.C. — Allegations that several defendants, including AT&T Corp., infringed three patents relating to voice and video transmission will be revisited, in light of findings Jan. 24 by the Federal Circuit U.S. Court of Appeals that a Delaware federal judge erroneously construed “public telephone network” (United Access Technologies LLC v. AT&T Corporation, et al., Nos. 2017-2614, -2615, -2616, 2018-1030, -1031, -1032, Fed. Cir., 2019 U.S. App. LEXIS 2304)....