01/31/2010. Remarks by Johan Visschedijk: "Curtiss also developed and produced electric-actuated variable pitch propellers under the trade mark Curtiss Electric Propellers. The company logo proclaimed its features:

FEATHERING - CONSTANT SPEED - SELECTIVE PITCH Here the first experimental Curtiss-Electric four-bladed variable- pitch propeller is seen fitted to a standard USAAC P-36A in 1939.