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.

• List of United States Supreme Court cases, volume 319
• MedImmune, Inc. v. Genentech, Inc., 549 U.S. 118 (2007)

• Maines, Ruanne Neighbour (1949). "Declaratory Judgments: Patent Litigation: Justiciable Controversy". California Law Review. 37 (3). California Law Review, Vol. 37, No. 3: 506–510. doi:10.2307/3477809. JSTOR 3477809.

• Works related to Altvater v. Freeman at Wikisource
• Text of Altvater v. Freeman, 319 U.S. 359 (1943) is available from: CourtListener  Findlaw  Google Scholar  Justia  Library of Congress 

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