ALEXANDRIA, Va., June 19 -- United States Patent no. 12,331,679, issued on June 17, was assigned to RTX Corp. (Farmington, Conn.).

"Air recuperated engine with air reinjection" was invented by Stephen H. Taylor (East Hartford, Conn.), Alan Retersdorf (Avon, Conn.), Oliver V. Atassi (Longmeadow, Mass.) and Nathan A Snape (Tolland, Conn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A gas turbine engine assembly including a tap that is at a location up stream of the combustor section for drawing a bleed airflow. An exhaust heat exchanger is configured to transfer thermal energy from the exhaust gas flow into the bleed airflow and communicate the heated bleed airflow into the turbine section where it is expand...