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This file consists of testimony on behalf of Edison in the case of Zipernowsky v. Edison, which involved conflicting claims over alternating current systems.
Karl (or Charles) Zipernowsky (1853-1942) was a Hungarian electrical engineer. Along with Otto Blathy and Maximilian Deri, he invented the ZBD alternating current transformer to convert high-voltage electric current to lower-voltage current. Zipernowsky and his partners received several patents on their inventions. This interference involved an application filed by Edison on November 19, 1886, and an application filed by Zipernowsky on March 19, 1888. Included in this volume is a preliminary statement by Edison from November 1888, along with depositions by Edison and attorney Richard N. Dyer from May 1890.
[W100DMA] Litigation Record, 1888-1890 1888-1890
[W100DMA001], Legal Testimony, Thomas Alva Edison, November 7th, 1888 1888-11-07
[W100DMA002], Legal Testimony, Thomas Alva Edison, November 27th, 1888 1888-11-27
[W100DMA004], Legal Testimony, Thomas Alva Edison, May 20th, 1890 1890-05-20
[W100DMA020], Legal Testimony, Richard Nott Dyer, May 26th, 1890 1890-05-26