Mealey's (December 5, 2019, 12:19 PM EST) -- ALEXANDRIA, Va. — A Blackberry Ltd. patent claiming a system and method for pushing information to a handheld device will be subject to upcoming inter partes review (IPR) by the Patent Trial and Appeal Board, the board announced Dec. 4 (Facebook Inc., et al. v. Blackberry Ltd., No. IPR2019-00941, PTAB)....