This folder contains correspondence and other documents concerning the patents possessed or considered for purchase by the Edison-Saunders Compressed Air Co. relating to the development of a pneumatic motor. Included is a letter from William L. Saunders of the Ingersoll- Sergeant Drill Co. to Walter S. Mallory of the New Jersey and Pennsylvania Concentrating Works evaluating existing patents. Also included is a statement of company accounts for the period 1899-1904.

All of the documents have been selected except for one routine report of patent claims.