531 U.S. 497 (2001) Cited 1,366 times 3 Legal Analyses
Holding that the "claim-preclusive effect" of a previous decision by a federal court sitting in diversity is governed by "the law that would be applied by state courts in the State in which the federal diversity court sits"
Holding that the district court did not abuse its discretion by excluding expert witness testimony where plaintiff failed to timely identify the witness "without substantial justification"
Holding that a sanctions order was final for purposes of the collateral-order doctrine even though the district court hadn't set the amount of sanctions
Holding that a consent judgment dismissing a prior declaratory judgment action alleging patent invalidity and non-infringement did not bar the defendants from contesting the validity of plaintiffs' patent because the parties did not specifically include the patent that was the subject of this lawsuit in their consent judgment
Fed. R. Civ. P. 19 Cited 9,572 times 55 Legal Analyses
Holding a person must be joined if disposing the action in the person's absence may leave an existing party subject to a "substantial" risk of incurring inconsistent obligations