ALEXANDRIA, Va., July 30 -- United States Patent no. 12,372,087, issued on July 29, was assigned to Brian Tooley Racing Inc. (Bardstown, Ky.).

"Supercharger rotors for increased engine power output" was invented by Brian Keith Tooley (Bardstown, Ky.) and Richard Crawford (Hope Mills, N.C.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An apparatus and methods for a rotor pack are provided for a positive displacement supercharger that produces greater engine power output without loss of best seal between the rotors or between the rotors and an interior surface of an enclosing case. The rotors include relief zones and cupped portions at an intake airflow side of each lobe comprising the rotors. The relief zone...