This folder contains correspondence to and from Edison's patent attorneys and agents, along with other documents relating to domestic and foreign patent applications, patent litigation, and other patent matters. Included are letters pertaining to patents for the electric lamp, the mimeograph, the phonograph, and ore milling machinery. Most of the letters are from the law firm of Dyer & Seely.

All of the documents have been selected except for 6 non-substantive items relating to patent interferences, renewals, and other routine transactions.