This folder contains correspondence about the technical and commercial development of the phonograph. Included are letters about the cancellation of Edison Phonograph Toy Manufacturing Co. contracts and stock certificates, and the settlement of a suit between the Edison United Phonograph Co., the North American Phonograph Co., and the Edison Phonograph Works. Many of the letters are by Richard N. Dyer, Edison's attorney.

All of the documents have been selected.

Courtesy of Thomas Edison National Historical Park.