Hall Signal Co. v. Union Switch & Signal Co.

Citations

• 115 F. 638
• 1901 U.S. App. LEXIS 4752

Syllabus

<p>1. Patents — Validity—Claim: of Joint Invention.</p> <p>A patent issued to a single individual is prima facie evidence that he was the inventor of the device shown, and it can only be overthrown on the ground that the invention was joint by the clearest and most reliable evidence.</p> <p>& Same — Validity and Infringement — Railway Signaling Device.</p> <p>The Buchanan patent, No. 497,489, for an improvement in circuit-controlling devices for use in automatic railway signaling apparatus, and designed to overcome the dangers resulting from lightning fusion in the Robinson system, was not anticipated, shows invention, and is valid; also held infringed.</p>