05/11/1904 Dyer, Frank Lewis to American Graphophone Co
(Columbia Phonograph Co; National Phonograph Co) Competition and market structure; Patent infringement; Cylinder record and duplicating technology
[QP034]  Legal Series -- Legal Department Records -- Phonograph -- Case Files: National Phonograph Company v. American Graphophone Company and Columbia Phonograph Company, General (Edison Patents 454,941, 397,280, and 430,278)
[QP034AAI; TAEM 225:704]
Courtesy of Thomas Edison National Historical Park.
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