United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 616
J. W. OWEN. METHOD OF MAKING SOUND RECORDS AND THE MATRICES FOR FORMING SOUND RECORDS. APPLICATION FILED MAT 4, 1908. … COLUMBIA PLANOOftAPH CO.. WASHINGTON, O. C.
Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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