Torque compensator for rotating wing systems (patented October 23, 1934),

Hydraulic drilling apparatus (patented Apr. 4, 1944),

Helicopter (patented Nov. 6, 1945),

Hydraulic drilling device (patented Nov. 13, 1945),

Well drilling apparatus (patented Dec. 11, 1945), Hydraulic expansible chamber motor with longitudinally extensible cylinder (patented May 18, 1948), Apparatus for converting intermittent power to continuous power (patented Nov. 16, 1948), Wind rotor (patented Oct. 11, 1949), Hose turner (patented July 25, 1950), Hydraulic control for drilling apparatus (patented Sept. 12, 1950), Jet propulsion engine (patented May 15, 1951)