This folder contains correspondence to and from Edison's patent attorneys and agents, along with other letters relating to domestic and foreign patent applications, patent litigation, and other patent matters. Included are letters pertaining to patents for the electric lamp, the dynamo, the phonograph, and ore milling machinery. There are also letters concerning lamp patent litigation in the United States, Canada, and Great Britain. Among the correspondents are Richard N. Dyer, George E. Gouraud, Lemuel W. Serrell, Sherburne B. Eaton, and Grosvenor P. Lowrey.

Approximately 90 percent of the documents have been selected. The following categories of documents have not been selected: letters of transmittal; duplicate copies of selected documents.