U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 145
—*E. SU G WITNESSES: « ^ … JFZgr.6 INVENTOR ^^ *&■ <^2S*^c Attorneys l Nonitil pctlfi^ c 3., WASHINGTON, D. C. (No Model.) 5 Sheets—Sheet 4. H. H. PATTEE. TIME REGISTERING- APPARATUS FOR ELECTRICITY. No. 478,237. Patented July 5, 1892.
Clocks and watches
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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