ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,509,234, issued on Dec. 30, was assigned to Boom Technology Inc. (Centennial, Colo.).

"Propulsion system architecture" was invented by Nathaniel Blake Scholl (Englewood, Colo.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An aircraft propulsion system having a variable airflow capture area is provided. The propulsion system includes a main propulsion source and an auxiliary propulsion source. In a first mode, the auxiliary propulsion source is stowed within an aerodynamic profile of the aircraft, and the main propulsion source provides all of the propulsion force for powering flight of the aircraft. In a second mode, the auxiliary propulsion source is ...