Granted Patent
Utility
US 5,281,223 · App. 07/949,103
Tool and method for derotating scoliotic spine
Inventor:
R. Charles Ray
Patented Case
View Patent ↗
Granted: Jan 25, 1994
Filed: Sep 21, 1992
Inventor
R. Charles Ray
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.