Granted Patent
Utility
US 4,611,581 · App. 06/562,438
Apparatus for straightening spinal columns
Inventor:
Arthur D. Steffee
Patented Case
View Patent ↗
Granted: Sep 16, 1986
Filed: Dec 16, 1983
Inventor
Arthur D. Steffee
Assignee (at issue)
AcroMed Corporation
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.