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U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 301
^-Z^C^L^^^SlZ. , (No Mode!. No. 483,151 S. H. HOGGSON. TIME STAMP. 5 Sheets—Sheet 2. Patented Sept. 27, 1892. … «o °o ^^ ^ %%&>*Clocks and watches
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