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 phonograph, and ore milling machinery. There are also letters congratulating Edison on the successful outcome of Edison Electric Light Company v. United States Electric Lighting Company and reports by attorney Sherburne B. Eaton to the Patent Litigation Committee, which was created to review the status of pending interferences. Many of the letters are from the law firm of Dyer & Seely.

Approximately 70 percent of the documents have been selected. The following categories of documents have not been selected: routine correspondence about patent issues and renewals, application fees, taxes, and other routine patent transactions; letters of transmittal and acknowledgement.