U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 223
S (No Model.; 4 Sheets—Sheet 4. W. F. GARDNER. CLOCK SYNCHRONIZING DEVICE AND SYSTEM. No. 480,577 Patented Aug. 9, 1892. H3 … &ti*L - i*. ^ ^ 38 y -*uU Zlttoz.-ne.u6 United States Patent Office. WILLIAM F. GARDNER, OF WASHINGTON, DISTRICT OF COLUMBIA.CLOCK-SYNCHRONIZING DEVICE AND SYSTEM. SPECIFICATION forming part of Letters Patent No. 480,577, dated August 9, 1892.Application filed December 13,1888. Renewed July 8,…
Clocks and watches
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