550 U.S. 398 (2007) Cited 1,557 times 185 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"
261 U.S. 45 (1923) Cited 520 times 7 Legal Analyses
Holding that the oral testimony of prior public use "falls short of being enough to overcome the presumption of novelty from the granting of the patent" when "there is not a single written record, letter or specification of prior date to [the patentee's] application that discloses any such discovery by anyone. . . ."
185 U.S. 403 (1902) Cited 224 times 4 Legal Analyses
Stating that "any description which is sufficient to ... serve as a warning to others of what the patent claims as a monopoly, is sufficiently definite to sustain the patent"
35 U.S.C. § 103 Cited 6,143 times 481 Legal Analyses
Holding the party seeking invalidity must prove "the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains."