Opinion · Supreme Court of the United States

Keyes v. Eureka Consolidated Mining Co.

Keyes v. Eureka Consol. Mining Co., 158 U.S. 150 (1895)

Type
Opinion
Court
Supreme Court of the United States
Jurisdiction
Federal
Date
1895-05-06
Topic
general

Mr. Chief Justice Fuller, after stating the case, delivered the opinion of the court. As stated by the Circuit Court, when this patent was applied for andissued^ complainants were both in the employment of the defendant, one as superintendent of defendant’s mine, and the other as assayer and smelter at the mine and smelting works, each receiving a regular salary. “While thus engaged they made the invention covered by the patent, and on April 19,1871, before the application for the patent, put the improvement on the first furnace of defendant, and on April 24, the date of the application, put it on the second furnace. These improvements were continuously used in defendant’s works from that time on to the commencement of this suit. Complainant Keyes left defendant’s employment September 1, 1872, and complainant Arents “on November 10, 1872.

Citator

UpLaw has not yet analyzed Keyes v. Eureka Consolidated Mining Co.. The absence of a flag is not a finding that it is good law.

Cited by
29 opinions

Headnotes

  1. Patent Law — Implied License Where an inventor permits his employer to use a patented invention without charge for so long as he remains in the employer's service, an implied license arises permitting the employer to continue use of the invention after the employment ends upon the same terms and royalties charged to other parties. 158 U.S. 150 (opinion of the Court)
  2. Remedies — Jurisdiction over Patent Infringement Equity jurisdiction over a patent infringement claim rests on the right to an injunction according to the course and principles of courts of equity, and where the patent expires before the defendant is required to answer and no preliminary injunction is sought or shown necessary, the complainant is not entitled to relief on equitable grounds. 158 U.S. 150 (citing Rev. Stat. § 4921)
  3. Remedies — Laches An unexplained delay of more than seventeen years in asserting a patent, during which the invention was used with the patentee's knowledge and assent and without complaint, disentitles the patentee to a preliminary injunction. 158 U.S. 150 (citing McLaughlin v. People's Railroad, 21 F. 574, and American Cable Railway Co. v. Chicago City Railway Co., 41 F. 522)
  4. Remedies — Adequate Remedy at Law A bill in equity for patent infringement is properly dismissed where the complainant, at the time of filing, was not entitled to any relief on equitable grounds and the remedy at law was plain, adequate, and complete. 158 U.S. 150 (opinion of the Court)