550 U.S. 398 (2007) Cited 1,519 times 169 Legal Analyses
Holding that, in an obviousness analysis, "[r]igid preventative rules that deny factfinders recourse to common sense, however, are neither necessary under our case law nor consistent with it"
Holding an inventor may define specific terms used to describe invention, but must do so "with reasonable clarity, deliberateness, and precision" and, if done, must "'set out his uncommon definition in some manner within the patent disclosure' so as to give one of ordinary skill in the art notice of the change" in meaning
Affirming conclusion that toothbrush and small hair brush were in same field of endeavor because "the structural similarities between toothbrushes and small brushes for hair would have led one of ordinary skill in the art working in the specific field of hairbrushes to consider all similar brushes including toothbrushes"
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.