ALEXANDRIA, Va., April 7 -- United States Patent no. 12,595,835, issued on April 7, was assigned to Thyssenkrupp Bilstein of America Inc. (Hamilton, Ohio) and thyssenkrupp AG (Essen, Germany).

"End-stop control valves for providing progessive damping forces in vibration dampers" was invented by Peter Kropczynski (Cincinnati).

According to the abstract* released by the U.S. Patent & Trademark Office: "A vibration damper includes an end-stop control valve that progressively adds end-of-stroke damping force to complement the damping force provided by a main piston. The end-stop control valve may include a valve piston assembly that has a valve piston insert, a piston that is disposed radially outside the valve piston insert, and a valve disc...