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 electric lighting and power, the electric railway, the phonograph, and ore milling. Most 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 interferences and renewals, application fees, taxes, and other routine transactions; letters of transmittal and acknowledgement.