(March 26, 2019, 11:42 AM EDT) -- ALEXANDRIA, Va. — In a March 25 petition for inter partes review (IPR), Snap Inc. maintains that various claims of a BlackBerry Inc. patent directed to “pushing” targeted advertising to mobile devices would have been obvious to, or anticipated by, a person of skill in the art (POSITA) (Snap Inc. v. BlackBerry Inc., No. IPR2019-00830, PTAB)....