ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,440,245, issued on Oct. 14.
"Pivotable bone anchor assembly with independent provisional locking by insert compressing member" 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 screw assembly includes a threaded shank body having an integral upper portion receivable in a receiver, with the receiver having an upper channel for receiving a longitudinal connecting member and a lower cavity cooperating with a lower opening. The assembly also includes a downloadable compression insert with a side arm extension for engagement and compression by a vertic...