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U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 303
C^iC^Ca^^^^m-^<. — (No Model. No. 483,151 S. H. HOGGSON. TIME STAMP. 5 Sheets—Sheet 3. Patented Sept. 27, 1892. … TVz t zj ess es; :Clocks and watches
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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