Semtek International Inc. v. Lockheed Martin Corp.
Case Date: 05/07/2025
Semtek International Inc. v. Lockheed Martin Corp., 531 U.S. 497 (2001), is a United States Supreme Court case in which the Court held that the claim preclusive effect of a federal judgment on a claim over which subject matter jurisdiction is based solely on diversity is determined by the common law of the state in which the federal district court rendering the decision is located.
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