Inside Out Library · Explore

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

United States. Patent Office · [Washington, D.C.] : U.S. Patent Office · leaf 864

An illustration from U.S. patents covering time keeping mechanisms, 1923, leaf 864
Oct. 9 , 1923. 1,469,887 E. N. BURLEIGH ELECTRIC ALARM CLOCK Filed Nov. 18 . 1922 3 Sheets-Sheet 1 … c^r 33 s 50. *^". S& ^jrvventot JZcrs~s?r&s?A?3i(r,/e.ig& <**~y r °C<*-«^y, attom^s

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