The U.S. Supreme Court's 2007 KSR International Co. v. Teleflex Inc. brought about a significant change in patent law, specifically in the area of determining whether or not inventions are non-obvious, thus patentable. This book presents a timely review of how this issue, has been analyzed, applied, and considered by the International Trade Commission and the U.S. Patent and Trademark Office, the district courts of the various regional circuits, and the U.S. Court of Appeals for the Federal Circuit.