U.S. Court of Appeals, District of Columbia Circuit

Contains full text opinions of all cases since 1995

U.S. Court of Appeals, Federal Circuit

The offical court website.

U.S. Court of Appeals, Circuits 1 through 11

US Appeals Circuit 1
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U.S. Court of Federal Claims

Contains full text opinions of all cases since 1997

U.S. Supreme Court

Contains full text opinions of all cases since 1990;
Limited access to 500 most important historical cases