ALEXANDRIA, Va., March 5 -- United States Patent no. 12,241,410, issued on March 4, was assigned to The Boeing Co. (Arlington, Va.).

"Engine nacelle anti-ice swirl system with unsteady fluid flow" was invented by Rene Woszidlo (Lawrence, Kan.), John Alexander Ziebart (Bellevue, Wash.) and Venkateswara K. Reddy (Bangalore, India).

According to the abstract* released by the U.S. Patent & Trademark Office: "An anti-ice swirl system for an aircraft engine includes a nacelle including a first nacelle section exposed to ambient environment and facing an oncoming airstream when an aircraft powered by the engine is in flight. The first nacelle section defines a circumferential D-duct. The anti-ice swirl system also includes a nozzle configured to...