After the Supreme Court issued its 2007 decision in KSR International Co. v. Teleflex Inc., rebuking the Federal Circuit for its rigid application of the “teaching, suggestion, or motivation test” for evaluating the obviousness of claimed inventions, the U.S. Patent and Trademark Office updated its own guidelines on this issue. The new guidelines outline seven rationales under which USPTO examiners might invalidate an applicant’s patent claims as obvious under 35 U.S.C. Section 103. In addition, obviousness determinations at the USPTO are potentially impacted by KSR’s treatment of the scope of analogous art.