or "inherently” require the claim element that is believed to have been rendered obvious and makes much of the fact that (in its opinion) APT’s prior art references do not meet this rigorous standard. Yet in attempting to describe this standard for finding a patent invalid because obvious, IXYS has erroneously cited this court to several cases discussing the standard for invalidity by anticipation, not by obviousness. Compare Trintec Indus., Inc. v. Top-U.S.A. Corp., 295 F.3d 1292, 1295 (Fed. Cir.2002) ("Inherent anticipation requires that the missing descriptive material is 'necessarily present,’ not merely probably or possibly present, in the prior art.”) (citations omitted); Rosco, Inc. v. Mirror Lite Co., 304 F.3d 1373, 1380 (Fed.Cir.2002) (same), with Al-Site, 174 F.3d at 1323 (<HOLDING>). A plaintiff who seeks to prove invalidity for
holding of obviousness affirmed on the basis of the teachings of the prior art references in combination not on the basis of the contemporaneous invention holding that the moving party must show prior art references which alone or combined with other references would have rendered the invention obvious to one of ordinary skill in the art at the time of the invention recognizing that courts must be careful not to allow hindsight reconstruction of references to reach the claimed invention without any explanation as to how or why the references would be combined to produce the claimed invention holding the district court erred by considering the references in less than their entireties ie in disregarding disclosures in the references that diverge from and teach away from the invention at hand holding that the one challenging the patent must in part show that the subject matter of the sale or offer to sell fully anticipated the claimed invention or would have rendered it obvious by its addition to the prior art