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U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 359
(No Model.) 2 Sheets—Sheet 2.. J. D. McANLIS & H. E. FLEMING. ELECTRIC CLOCK, No. 485,645, Patented Nov. 8, 1892. FIG-2. … F! 6.4Clocks and watches
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