ALEXANDRIA, Va., March 31 -- United States Patent no. 12,590,584, issued on March 31.

"Supercharged internal combustion engine with intake port timing shutters controlling the air mass flowing into the supercharger" was invented by Craig N. Hansen (Sioux Falls, S.D.) and Paul C. Cross (Plymouth, Minn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A supercharged internal combustion engine is drivably connected to a variable displacement supercharger operable to continuously supply varying amounts of an air mass to the engine in response to the varying power requirements of the engine. The variable displacement capability eliminates blowdown losses of fixed displacement superchargers and substantially reduces...