ALEXANDRIA, Va., July 9 -- United States Patent no. 12,352,173, issued on July 8, was assigned to RTX Corp. (Farmington, Conn.).

"Gas turbine engine with carbon/carbon composite piston seal" was invented by Calvin Jay Winder (Cromwell, Conn.), Fadi S. Maalouf (East Hampton, Conn.), Matthew E. Bintz (West Hartford, Conn.), Peter T. Schutte (Manchester, Conn.), Pieter Van Lieu (Cheshire, Conn.), Justin Roger DeLarm (Bolton, Conn.), Anna Lauren Wright (Poulsbo, Wash.), Hamidreza Mohseni (Avon, Conn.), David R. Lyders (Glastonbury, Conn.) and Xiaomei Fang (South Glastonbury, Conn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A gas turbine engine includes a rotor that that has a seal surface, a shaft that has a...