(November 1, 2017, 1:37 PM EDT) -- ALEXANDRIA, Va. — Three petitioners, including Canon Inc., took aim on Oct. 31 at a patented video surveillance system that extracts “primitives” from a video, in a new petition for inter partes review before the Patent Trial and Appeal Board (Axis Communications AB, et al., v. Avigilon Fortress Corporation, No. IPR2018-00138, PTAB)....