U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 59
35ciA … IJVYEJY203i /j +* Attorney ■urns «Tcne co., Photo-utho., United States Patent Office. JOHN ALEXANDER GUINN, OF PERRY, IOWA.RAILWAY TIME-SIGNAL. SPECIFICATION forming part of Letters Patent No. 475,108. dated May 17,1892. Application filed January 21,1892. Serial No, 418,818, (No model.) To all whom…
Clocks and watches
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