ALEXANDRIA, Va., June 6 -- United States Patent no. 12,281,580, issued on April 22.
"Rotary-wing vehicle, and rotary-wing turbine" was invented by Friedrich Grimm (Stuttgart, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A device has a rotor module comprising a motor generator, rotor blades, and a rotary-wing kinematic system for the rotor blades connected to the motor generator. The rotor blades are each divided into a plurality of longitudinal sections, each for receiving at least one actuator integrated in a longitudinal member or transverse member of the rotor blade, and have a variable, asymmetrical airfoil which, in one revolution of the rotor blade on a diameter of the circular path, the diam...