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[Graphophone patents] (1878)

United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 343

An illustration from [Graphophone patents], 1878, leaf 343
■zo ■ WITNESSES; ^^ /? ili-l^/-? … 9 inventors: BY.

Phonograph · Patents

Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.

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