ALEXANDRIA, Va., July 16 -- United States Patent no. 12,667,392, issued on June 30, was assigned to LIFE SPINE INC. (Huntley, Ill.).

"Bottom loading poly-axial screw" was invented by Forrest Samuel (Carlsbad, Calif.), Gregory Palagi (Geneva, Ill.) and David Mehl (Lake in the Hills, Ill.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A modular poly-axial bone screw includes a poly-axial bone screw, a poly-axial tulip head, and a collet disposed within the tulip head, the collet interacting with the bone screw and tulip head providing an interference fit with the bone screw head to lock orientation of the tulip head on and relative to the bone screw. Inner configurations of the tulip head interact with outer c...