Evans v. Eaton, 16 U.S. (3 Wheat.) 454 (1818), was a United States Supreme Court case in which the Court held that a patent disclosing an improved method of manufacture by means of several different improved machines should be construed to claim both the method and the improvements to the machines, but not to include the machines apart from the inventor's improvements. In addition to its legal significance, the opinion is notable for containing in its appendix a transcript of the Evans patent and patent application, otherwise unavailable to the modern reader.