ALEXANDRIA, Va., April 7 -- United States Patent no. 12,595,760, issued on April 7, was assigned to General Electric Co. (Evendale, Ohio).

"Unducted propulsion system" was invented by Syed Arif Khalid (West Chester, Ohio), Daniel L. Tweedt (West Chester, Ohio) and David B. Riddle (Cincinnati).

According to the abstract* released by the U.S. Patent & Trademark Office: "Apparatuses and systems are provided herein for unducted propulsion systems. The system includes an aft housing for low drag for high subsonic sustained flight. A plurality of blades are affixed to the aft housing, wherein the housing defines a flowpath curve extending from the axial extent of the aft blade root to the aft end of the aft housing. The flowpath curve is descri...