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U.S. patents covering time keeping mechanisms (1923)
United States. Patent Office · [Washington, D.C.] : U.S. Patent Office · leaf 1140
Nov. 27, 1923. 1,475,643 G. W. MEAD TIMER OILER Filed March 6, 1923 … Fiq. L F/j. 4-. iz f Fij. 5. Fiq. 3. INVENTOR. QMMead. BY ATTORNEYS.Clocks and watches
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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