ALEXANDRIA, Va., June 9 -- United States Patent no. 12,286,212, issued on April 29, was assigned to General Electric Co. (Evendale, Ohio).

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

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 a forward housing for high efficiency for high subsonic sustained flight. A plurality of blades are affixed to the forward housing, wherein the forward housing defines a flowpath curve extending from the forward-most end of the forward housing through the axial extent of a forward blade root. The flowpath cur...