The Thomas A. Edison Papers Digital Edition

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This file consists of testimony and exhibits on behalf of Edison in the case of Edison v. Dickerson, which involved conflicting claims over the sextuplex—a telegraph designed to send six messages simultaneously along the same wire. Edward N. Dickerson, Jr., was an inventor and attorney for Western Union. Included are depositions, taken in January 1889, by Edison and George M. Phelps of Western Union.