Inside Out Library · Explore

U.S. patents covering time keeping mechanisms (1923)

United States. Patent Office · [Washington, D.C.] : U.S. Patent Office · leaf 464

An illustration from U.S. patents covering time keeping mechanisms, 1923, leaf 464
June 12, 1923. 1,458,211 E. F. KINGSBURY PHOTOGRAPHIC SHUTTER Filed Dec. 6, 1919

Clocks and watches

Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.

More pictures from U.S. patents covering time keeping mechanisms

More like this