ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,428,142, issued on Sept. 30, was assigned to Eagle Technologies LLC (Newport News, Va.).
"Helicopter rotor system" was invented by John P. Benner (Williamsburg, Va.), Michael D. Bartley (Newport News, Va.), Cary A. Kravets (Norfolk, Va.) and Bruce E. Bailey (Williamsburg, Va.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A coaxial rotor system includes a plurality of upper rotor blades and a plurality of lower rotor blades disposed at a mast assembly. The upper rotor blades rotate about an axis of rotation in a first direction and the lower rotor blades rotate about the axis of rotation in a second direction opposite the first direction. A control sys...