Granted Patent
Utility
US 4,728,334 · App. 06/903,854
Shaft for hip joint prosthesis
Inventor:
Lorenzo Spotorno
Patented Case
View Patent ↗
Granted: Mar 1, 1988
Filed: Aug 29, 1986
Inventor
Lorenzo Spotorno
Assignee (at issue)
PROTEK, INC.
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.