This is a Notable Technology milestone.
A pusher propeller is one mounted at the rear of the aircraft, providing forward thrust. The aircraft, designed by Etienne Dormoy, was flown by Buhl test pilot Jimmy Johnson.
Source: American Autogiro, Gyroplane and Early Convertaplane Developments, Journal of The American Helicopter Society, Vol. 1, No. 1, January 1956, Page 10)