U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 499
: MORRIS f^TEH?. CO PMOTO-LITHO . WASHINGTON, c United States Patent Office. HENRI JACOT-BURMANN, OF BIENNE, SWITZERLAND.STOP-WATCH. SPECIFICATION forming part of Letters Patent No. 489,255, dated January 3,1893. Application filed September 19, 1892. Serial No. 446,278. (No model.) To all whom it…
Clocks and watches
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