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Miller v. Eagle Manufacturing Co.

151 U.S. 186 (1894)

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Miller v. Eagle Manufacturing Co.

United States Supreme Court
151 U.S. 186 (1894)

Facts

In 1879, a patent was issued on a spring that could both raise and lower a plow. In 1881, another patent was issued covering the same invention, but only the lifting effect. No substantial distinction existed between the patents’ respective descriptions of the lifting effect. In an infringement action, the circuit court deemed both patents to be valid. The case was appealed to the United States Supreme Court.

Rule of Law

Issue

Holding and Reasoning (Jackson, J.)

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Casebooks

Patent

Key Terms