Inside Out Library · Explore
U.S. patents covering time keeping mechanisms (1923)
United States. Patent Office · [Washington, D.C.] : U.S. Patent Office · leaf 994
1,472,859 Nov. 6, 1923. A. VASSELLI TIME ANNOUNCING PHONOGRAPH 10 Sheets-Sheet 9 Filed July 28 . 1920 … yJ^.T/k^^Mi INVENTOR BY ATTORNEYClocks 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
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten07unit-59-59.webp)
