Complex sentence: In 1929 he announced a set of patents which addressed the flight stabilization of rotorcraft, and, in 1931, Breguet created the "Syndicat d'Etudes de Gyroplane" (French for "Syndicate for Gyroplane Studies"), together with Rene Dorand as technical director.
Split into simpler sentences: In 1929 he announced a set of patents which addressed the flight stabilization of rotorcraft. In 1931, Breguet created the "Syndicat d'Etudes de Gyroplane" (French for "Syndicate for Gyroplane Studies"), together with Rene Dorand as technical director.