U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 163
i/rZtnewet: ^ (No Model.) No. 478,284. J, C. KOCH. WORKMANS TIME RECORDER. 3 Sheets—Sheet 3. Patented July 5, 1892, a … c cfcoct ■ S. - ---- . 7 __- ; 1 a h i k\ -----;- I L-.l r__T\ £ cfctq.6 M V3 13. i i, p I 1 I S|KjT\/ /3 ; lliif wca -/« c/rw-eritcn. ■ United States Patent Office, JOHN C. KOCH, OF BERLIN, GERMANYWORKMANS TIME-RECORDER. SPECIFICATION forming part of Letters Patent No. 478,284, dated July 5, 1892.…
Clocks and watches
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