Adolph F. Herzog (1906-1997) was an aeronautical engineer who worked for the Pitcairn Aircraft Company, the Pitcairn-Cierva Autogiro Company, and later for the Platt-LePage Aircraft Company. The Platt-LePage Aircraft Company was a manufacturer of aircraft for the armed forces, including the first helicopter to be acquired by the U.S. Army. The collection contains several items related to the Platt-LePage Helicopter Company and Wynn Laurence LePage (1902-1989).