United States v. Line Material Co., 333 U.S. 287 (1948), is a decision of the United States Supreme Court limiting the doctrine of the 1926 General Electric decision, excusing price fixing in patent license agreements. The Line Material Court held that cross-licenses between two manufacturer competitors, providing for fixing the prices of the licensed products and providing that one of the manufacturers would license other manufacturers under the patents of each manufacturer, subject to similar price fixing, violated Sherman Act § 1. The Court further held that the licensees who, with knowledge of such arrangements, entered into the price-fixing licenses thereby became party to a hub-and-spoke conspiracy in violation of Sherman Act § 1.

United States v. Huck Mfg. Co., 382 U.S. 197 (1965), is the most recent patent-license price-fixing case to reach the United States Supreme Court. It was inconclusive, as the Court split 4–4 and affirmed the decision of the lower court without opinion.