[Graphophone patents]

United States. Patent Office · 1878 · Washington, D.C., Govt. Print. Off. · 18 pictures

A collection of United States Patent Office patent drawings, published in Washington, D.C. in 1878, documenting early phonograph and graphophone inventions for patent holders and examiners. The pictures are technical line engravings of mechanical parts such as cylinders, clamps, housings and styli, with numbered reference letters and figure labels that a designer could borrow for diagrammatic, schematic or retro engineering motifs.

Phonograph · Patents

Internet Archive · Smithsonian Libraries · Public domain (published before 1931) · More from this library