ALEXANDRIA, Va., July 28 -- United States Patent no. 12,690,895, issued on July 28.

"Method of assembling a pivotal bone anchor assembly having a receiver and twist-in-place insert" was invented by Roger P. Jackson (Prairie Village, Kan.) and James L. Surber (Kansas City, Kan.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of assembling a receiver assembly includes positioning a retainer and an insert into a through-space of a receiver that extends between a bottom opening and an upper opening, such that a second channel of the insert is in non-alignment with a first channel of the receiver. The through-space includes at least one integral downward facing surface and an integral inward projecting su...