ALEXANDRIA, Va., Feb. 26 -- United States Patent no. 12,234,024, issued on Feb. 25, was assigned to Textron Innovations Inc. (Providence, R.I.).

"Ram filter purge system" was invented by John Robert Wittmaak Jr. (Newark, Texas), Brennan Stults (Keller, Texas), Keith David Weaver (North Richland Hills, Texas) and Richard Lee Thackway (Trophy Club, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "An aircraft nacelle includes a forward cruise inlet, a forward-cruise-inlet conduit coupled to the forward cruise inlet and operable to supply air from the forward cruise inlet to an engine housed by the aircraft nacelle, an inlet barrier filter, an inlet-barrier-filter compartment coupled to the inlet barrier fil...