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U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 235
INVENTOR r 1RNEY. (No Model.) 2 Sheets—Sheet 2. E. WESTON. ELECTRIC-TIME INDICATING APPARATUS. No. 480,890. Patented Aug. 16, 1892, icrrS. TT … WITNESSES:Clocks and watches
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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