(February 26, 2018, 9:39 AM EST) -- ALEXANDRIA, Va. — Citing five pieces of prior art, Nikon Corp. on Feb. 22 petitioned the Patent Trial and Appeal Board for inter partes review of a patent directed to image pattern detection and recognition for detecting human faces (Nikon Corporation v. ASML Netherlands B.V. and Carl Zeiss AG, No. IPR2018-00688, PTAB)....