ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,458,409, issued on Nov. 4.
"Pivotal bone anchor assembly with increased shank head angulation" 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 pivotal bone anchor assembly includes a receiver having a first channel for receiving a rod and a central bore with a seating surface adjacent a bottom opening with a first cut-out portion. The assembly also includes a bone anchor having an upper end portion pivotably engageable with the seating surface, an anchor portion opposite the upper end portion, and a neck extending between the upper end and anchor portions. Th...