Barrett's Intellectual Property 4th, 2013 Supplement updates the case book through the summer of 2013. It includes both recent Supreme Court cases and perhaps, most importantly, the Leahy-Smith America Invents Act, Pub. L. No. 112-29, 125 Stat. 284 (2011),which has been hailed as the most comprehensive U.S. patent reformsince the Patent Act of 1952.