 The United States Court of Appeals for the Federal Circuit affirmed the United States District Court for the Southern District of Florida's decision granting summary judgment to invalidate Perfect Web's '400 patent due to the obvious nature of the asserted claims under 35 U.S.C.§ 103.The Federal Circuit noted, as observed by the Supreme Court in "KSR v. Teleflex", that common sense can be a source of reasons to combine or modify prior art references to achieve the patented invention.