In January 2015, the U.S. Supreme Court handed down its decision in Teva Pharmaceuticals USA, Inc. v. Sandoz, Inc., holding that underlying factual disputes related to a district court's claim construction should be reviewed for clear error instead of de novo, as the Federal Circuit had long held. In three recent decisions issued over the span of just a few days, the Federal Circuit has grappled with just how to apply the Teva ruling. (Our prior coverage of the Teva decision can be found .) This brief Commentary provides a look at those decisions and what they may mean for future patent litigation.