This 12-page pamphlet contains a brief filed on behalf of Edison by George W. Dyer on February 22, 1882 in two related interferences involving dynamos: Edison v. Lane v. Gray v. Rose v. Gilliland; and Edison v. Lane v. Gray v. Edison & Johnson.

Related interference records can be found in Records of the Patent and Trademark Office (Record Group 241) in the National Archives.

Courtesy of Thomas Edison National Historical Park.