Judge Sorokin construed claim terms in this suit involving patents covering total knee replacement implants having cam and post designs. He first construed “cam” to mean “a structure that makes sliding or rolling contact with the tibial post as the knee bends.” He rejected MedIdea’s argument that the term would be discussed extensively at trial in a way that would permit the jury to discern the plain and ordinary meaning of the term, finding “cam” to be a critical term with which a lay jury would be unlikely to be familiar; moreover, it is the Court’s exclusive obligation to construe patent terms. He likewise construed related terms for which MedIdea suggested not construction was needed, indicating that the court is required to construe terms on which the parties disagree. He construed “cam mechanism” to require two or more cams, because the specification criticized one-cam structures and repeatedly referenced multiple cams. Judge Sorokin further agreed with DePuy that “early after initiation of flexion” of the knee should be construed as “prior to 30 degrees of flexion” rather than MedIdea’s proposed 60 degrees of flexion, as MedIdea’s number appeared to lack intrinsic or extrinsic support, while DePuy’s corresponded to the degree of flexion in prior art that was criticized in the patent. Finally, he refused to consider the definiteness of the terms “central cam” and terms using “superior” and “inferior,” finding that determination to be more suitably made on a fuller record at summary judgment.