Volume 822 — Federal Reporter, Third Series

Enfish, LLC v. Microsoft Corp., 822 F.3d 1327 (Fed. Cir. 2016), is a 2016 decision of the United States Court of Appeals for the Federal Circuit in which the court, for the second time since the United States Supreme Court decision in Alice Corp. v. CLS Bank upheld the patent–eligibility of software patent claims. The Federal Circuit reversed the district court's summary judgment ruling that all claims were patent–ineligible abstract ideas under Alice. Instead, the claims were directed to a specific improvement to the way computers operate, embodied in the claimed "self-referential table" for a database, which the relevant prior art did not contain.