U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 429
J. hi/tlltor. <ZL<e~e- THE ECKERT LITHOGRAPHING CO, WASHINGTON. D- C (No Model.) No. 486,977 5 Sheets—Sheet 4. R. D. MORGAN. WORKMANS TIME RECORDER. Patented Nov. 29, 1892. … y/?//////////////y/////////////%
Clocks and watches
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
