ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,509,213, issued on Dec. 30, was assigned to The Boeing Co. (Arlington, Va.).

"Auxiliary flap assembly" was invented by Samuel L. Block (Bothell, Wash.) and Kevin Tsai (Redmond, Wash.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An auxiliary flap assembly includes a base fixable to an aircraft wing, a track, a first pair of rollers, and a second pair of rollers. The base includes a first plate and a second plate. The track is coupled to the base and includes a first half defining a non-linear first roller path and a second half defining a non-linear second roller path in a back-to-back configuration. Both halves extend between a free end portion and a ...