This folder contains correspondence and other documents relating to the technical and commercial development of wireless telegraphy or radio. Included are items pertaining to agreements negotiated with the Marconi Wireless Telegraph Co. of America concerning Edison's patents and his position as technical advisor to the company. Most of the letters are by Edison's longtime associate William J. Hammer and by Eugene H. Lewis of the law firm of Eaton & Lewis.

All of the documents have been selected except for duplicates.