Holding that "because extrinsic evidence can help educate the court regarding the field of the invention and can help the court determine what a person of ordinary skill in the art would understand claim terms to mean, it is permissible for the district court in its sound discretion to admit and use such evidence"
Holding that party opposing summary judgment must show either that movant has not established its entitlement to judgment on the undisputed facts or that material issues of fact require resolution by trial
Finding that the Board's construction of key claim terms was unreasonably broad in light of the broadest reasonable interpretation standard, and on that basis vacating and remanding the Board's finding of unpatentability
Recognizing that the Supreme Court set aside the rigid application of the TSM Test and ensured use of customary knowledge as an ingredient in that equation.