US Patent Issued on Sept. 16 for "Spinal fixation system with modular receiver sub-assemblies for connecting with bi-spherical universal shank heads" (Kansas, Idaho Inventors)

ALEXANDRIA, Va., Sept. 17 -- United States Patent no. 12,414,801, issued on Sept. 16.

"Spinal fixation system with modular receiver sub-assemblies for connecting with bi-spherical universal shank heads" 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 spinal fixation system includes a plurality of bone anchors, each having an anchor portion and a shank head with an upper spherical surface having a first diameter extending downward to an inner edge of an annular shelf spaced below a hemisphere plane, and a lower spherical surface having a second diameter greater than the first d...