04/04/1909 Dyer, Frank Lewis [supplied or conjectured] to Edison, Thomas Alva
(New York Phonograph Co; Columbia Phonograph Co; North American Phonograph Co; Hazel, John Raymond; Roosevelt, Theodore; Gilmore, William Edgar) Competition and market structure; Litigation; Patent assignments, licenses, and royalties
[CL219]  Company Records Series -- National Phonograph Company -- Correspondence: Domestic (1909)
[CL219ABI; TAEM 217:81]
Courtesy of Thomas Edison National Historical Park.
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