U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 175
WITNESSES: INVENTOR ^/*^z* Sy4as&tr-fr-t/ (No Model.) No. 478,865, J. JACOBI. ELECTRIC TIME ALARM. 2 Sheets—Sheet 2. -Tip W. Patented July 12, 1892.
Clocks and watches
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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