ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,534,191, issued on Jan. 27.

"Reducing induced drag by creating additional airflow at the wing tip" was invented by Kiril Iliev Tomov (Sofia, Bulgaria).

According to the abstract* released by the U.S. Patent & Trademark Office: "Reduction of the induced drag by placing a convergent-divergent nozzle at the wingtip which creates an additional airflow with a velocity greater than the airflow velocity around the wing, which changes the nature and direction of the airflow along the upper and lower surfaces at the wingtip, thus forming a new vortex of lesser intensity, which is shifted to the sides of the wingtip, creating conditions for better airflow, less induced drag, and greater aerody...