Granted Patent
Utility
US 5,876,402 · App. 08/624,110
Anterior spinal polyaxial locking screw plate assembly having recessed retaining rings
Inventors:
Joseph P. Errico, Thomas J. Errico, James D. Ralph
Patented Case
View Patent ↗
Granted: Mar 2, 1999
Filed: Mar 29, 1996
Inventors
Joseph P. Errico
Thomas J. Errico
James D. Ralph
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.