KEYSTONE CO. v. EXCAVATOR CO.

Nos. 34 and 35.

290 U.S. 240 (1933)

KEYSTONE DRILLER CO. v. GENERAL EXCAVATOR CO.

Supreme Court of United States.

Decided December 4, 1933.


Attorney(s) appearing for the Case

Messrs. William H. Boyd and Frank O. Richey for petitioner.

Mr. Edwin P. Corbett, with whom Messrs. Lloyd T. Williams, Edward L. Reed, John H. Mahoney, Wade H. Ellis, and Challen B. Ellis were on the brief, for respondents.


MR. JUSTICE BUTLER delivered the opinion of the Court.

The question presented is whether the Circuit Court of Appeals rightly applied the maxim, He who comes into equity must come with clean hands.

Petitioner owns five patents which may be conveniently identified as the Clutter patent and the four Downie patents.* They all cover devices constituting parts of a ditching machine operated...

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