Inside Out Library
[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 489
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4i: - 962,446. H. E. MARKLE. MULTIPLEX QRAPHOPHONE.APPLIOATIOH FILED HAT 16, 1907, Patented June 28,1910. 4 8HE£T8-BH££T 2. -^^ .£. … SuvevitotPhonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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