11/01/1888 Batchelor, Charles -- Legal Statements and Testimony
(Exhibition. Philadelphia Electrical (1884); Townsend, Henry Clark; Seely, Henry W; Thomson, Elihu; Edison, Thomas Alva) Incandescent lamp
[W100DLA]  National Archives, Washington, D.C.: Records of the Patent and Trademark Office (Record Group 241) -- Patent Interference Files -- Edison v. Thomson -- Testimony on Behalf of Edison
[W100DLA050; TAEM 0:0]
Courtesy of the National Archives.