U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 781
3fir&4- ^(§rffH … ,5~ United States Patent Office. WARREN B. MARTINDALE, OF ROCHESTER, INDIANA.AUTOMATIC TIME-STAMP. SPECIFICATION forming part of Letters Patent No. 497,331, dated May 16, 1893. Application filed lone 30,1892. Serial No.438,643. (No model.) To all whom it may concern: Be it known that I, Warren B.…
Clocks and watches
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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