L’Auto-Volant, was a helicopter invented and built by Jean-Baptiste Laisnez and Charles Wilfart in France during 1905–06. Two rotors consisting of three arms, each of which held small moveable blades closed to form a flat surface on the downward stroke. The machine was featured in the February 1905 issue of the Parisian publication “Cosmos”. It was also the subject of the 1905 French patent #357,036.
All Aero 