KSR Int'l Co. v. Teleflex Inc., 550 U.S. 398 (2007), is a decision by the Supreme Court of the United States concerning the issue of obviousness as applied to patent claims.

[5] On April 30, 2007, the Supreme Court unanimously reversed the judgment of the Federal Circuit, holding that the disputed claim 4 of the patent was obvious under the requirements of 35 U.S.C.

The opinion stated that the application of the bar on patents claiming obvious subject matter "must not be confined within a test or formulation too constrained to serve its purpose."

[7][8][9][10] A statistical study[11] noted that there was a multi-fold increase in the percentage of patents found invalid on trials both on the basis of novelty and of non-obviousness before and after the certiorari in KSR.

In Leapfrog Enterprises, Inc. v. Fisher-Price, Inc.,[12] the Federal Circuit began applying the KSR case, holding U.S. Patent 5,813,861[13] invalid as obvious.

discuss how the 2007 Supreme Court decision creates the need for full knowledge and complete understanding about the obviousness of a new technology before the 2007 ruling (20/20 Hindsight).