Granted Patent
Utility
US 4,648,388 · App. 06/793,901
Apparatus and method for maintaining vertebrae in a desired relationship
Inventor:
Arthur D. Steffee
Patented Case
View Patent ↗
Granted: Mar 10, 1987
Filed: Nov 1, 1985
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.