US Patent Issued to Karem Aircraft on July 21 for "Aircraft with transonic rotor" (California Inventors)

ALEXANDRIA, Va., July 21 -- United States Patent no. 12,686,492, issued on July 21, was assigned to Karem Aircraft Inc. (Lake Forest, Calif.).

"Aircraft with transonic rotor" was invented by Abraham Karem (Lake Forest, Calif.), John Paul Parcell (Lake Forest, Calif.), Sage Thayer (Lake Forest, Calif.) and Ryan Patterson (Lake Forest, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A rotorcraft aircraft design incorporates double swept forward and aft rotor blades configured to provide efficient hover and efficient cruise at Mach number of 0.65-0.7 without varying a diameter of the rotor. The aircraft design combines the benefits of helicopters and fixed-wing aircraft, enabling vertical takeoff and land...