Schumacher v. Cornell,
96 U.S. 549 (1877)

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U.S. Supreme Court

Schumacher v. Cornell, 96 U.S. 549 (1877)

Schumacher v. Cornell

96 U.S. 549


1. Letters patent No. 133,638, granted Dec. 3, 1872, to William Johnson, for an improvement in wrenches, do not infringe reissued letters patent No. 6026, granted Aug. B, 1872, to John Lacey and George B. Cornell, for an improvement in wrenches for extracting bung-bushes.

2. The doctrine of mechanical equivalents has no application to this case.

This is a suit by George B. Cornell, against Eilert Schumacher and William Johnson, for an injunction, and for damages claimed for the alleged infringement by them of reissued letters patent No. 5026, granted Aug. 6, 1872, to John Lacey and George B. Cornell, for an improvement in wrenches for extracting bung-bushes; said letters being a reissue of original letters No. 118,617, dated Aug. 29, 1872.

The defendants justified under letters patent No. 133,536, issued to Johnson Dec. 3, 1872, for an improvement in wrenches.

The specification and claim of both patents are fully stated in the opinion of the Court.

The drawing therein referred to are as follows:

Page 96 U. S. 550


Page 96 U. S. 551


The court below decreed in favor of the complainant, and awarded him an injunction, whereupon the defendants appealed to this court.

Page 96 U. S. 552

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