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[Graphophone patents] (1878)

United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 793

An illustration from [Graphophone patents], 1878, leaf 793
n^s-i 3 5 … WITNESSES:C PDennh/vrdt ]/cx^<^Cc^(^C of-vn^c^ -E±5 S INVENTOR./-/erman 77iiiripan BY c^ct^^^^c^c^ t i » ATTORNEYS. UNITED STATES PATENT OFFICE. HERMAN THIMGAN, OF DENVER, COLORADO, ASSIGNOR TO THE COLORADOPHONOGRAPH COMPANY. A CORPORATION OP COLORADO. SOUND-AMPLIFIER POR PHONOGRAPHS. 1,263,625.…

Phonograph · Patents

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

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