US Patent Issued on Aug. 18 for "Bone anchor assembly with a downwardly displaceable twist-in-place insert" (Kansas, Idaho Inventors)

ALEXANDRIA, Va., Aug. 18 -- United States Patent no. 12,708,408, issued on Aug. 18.

"Bone anchor assembly with a downwardly displaceable twist-in-place insert" was invented by Roger P. Jackson (Prairie Village, Kan.), James L. Surber (Kansas City, Kan.) and Nathaniel D. Ginzton (Boise, Idaho).

According to the abstract* released by the U.S. Patent & Trademark Office: "A receiver assembly includes a receiver having a first channel for receiving a rod and a central bore extending upward from a bottom opening through the first channel that includes a closure mating structure adjacent the top of the receiver, upper and lower grooves beneath the closure mating structure, and cylindrical engagement surfaces between the upper and lower grooves. ...