ALEXANDRIA, Va., Aug. 26 -- United States Patent no. 12,397,909, issued on Aug. 26.
"Supplementary lift generation system for multicopter rotorcraft" was invented by Mihai Pruna Jr. (Amesbury, Mass.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A rotorcraft comprising of a fuselage, a plurality of arms on which electric motors driving propellers are mounted, one or a plurality of pivoting rotor supports on which thrust generating rotors with one or a plurality of blades attach. The rotor supports are substantially vertical when the aircraft is flying vertically, hovering, or on the ground, and tilted with respect to the aircraft when the aircraft has a forward motion component. The rotors are configured to ...