U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 193
j^.£ tf ^z^: £. / flu- .•( £Lt-tot44C1^ (No Model.) No. 479,379, 5 Sheets—Sheet 3. E. & H. C. STOCKWELL. TIME LOCK MECHANISM. Patented July 19, 1892. … <3Wifcl4<eoae;>
Clocks and watches
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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