Granted Patent
Utility
US 4,573,448 · App. 06/539,256
Method for decompressing herniated intervertebral discs
Inventor:
Parviz Kambin
Patented Case
View Patent ↗
Granted: Mar 4, 1986
Filed: Oct 5, 1983
Inventor
Parviz Kambin
Assignee (at issue)
Pilling Co.
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.