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ELECTRIC SIGNAL CO. v. HALL SIGNAL CO.

114 U.S. 87 (1885)

ELECTRIC RAILROAD SIGNAL COMPANY v. HALL RAILWAY SIGNAL COMPANY.

Supreme Court of United States.

Decided March 30, 1885.

Attorney(s) appearing for the Case

Mr. George H. Christy and Mr. Charles E. Perkins for appellant.

Mr. Simeon E. Baldwin for appellee.

MR. JUSTICE MATTHEWS delivered the opinion of the court.

This is a bill in equity for an injunction to restrain the alleged infringement of letters patent No. 140,536 for an improvement in circuits for electric railroad signals, issued July 1, 1873, to Frank L. Pope, of whom the appellants, who were complainants below, are assignees. On final hearing the bill was dismissed by a decree now brought here for review by this appeal...

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