Altvater v. Freeman, 319 U.S. 359 (1943), was a decision by the Supreme Court of the United States which held that, although a licensee had maintained payments of royalties, a Declaratory Judgment Act claim of invalidity of the licensed patent still presented a justiciable case or controversy.
See also List of United States Supreme Court cases, volume 319 MedImmune, Inc. v. Genentech, Inc.,
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