ALEXANDRIA, Va., April 2 -- United States Patent no. 12,262,923, issued on April 1, was assigned to K2M Inc. (Leesburg, Va.).

"Polyaxial bone screw with increased angulation" was invented by Timmon Ark (Vienna, Va.), Theo Choi (Arlington, Va.) and Keenan O'Brien (Grimesland, N.C.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A polyaxial bone device includes a screw, a screw housing, and a spring. The screw includes a screw head and a shaft that extends from the screw head. The screw housing defines a longitudinal axis and a bore that extends along the longitudinal axis. The screw housing includes a basewall and opposed sidewalls that extend from the basewall. The basewall defines a notch that receives the s...