ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,421,914, issued on Sept. 23, was assigned to Rolls-Royce North American Technologies Inc. (Indianapolis).

"Compact infrared suppressors with ring vanes for gas turbine engines" was invented by Curtlan C. Betchley (Indianapolis), Kenneth M. Pesyna (Indianapolis), Bryan H. Lerg (Indianapolis), Steven T. Berenyi (Indianapolis), Andrew M. Simonich (Indianapolis) and Victor L. Oechsle (Indianapolis).

According to the abstract* released by the U.S. Patent & Trademark Office: "An infrared suppressor adapted for use with a gas turbine engine includes a first ring arranged circumferentially around a axis, a second ring arranged circumferentially around the axis, and a strut that extends radi...