Granted Patent
Utility
US 5,609,639 · App. 08/163,623
Prosthesis for knee replacement
Inventor:
Peter S. Walker
Patented Case
View Patent ↗
Granted: Mar 11, 1997
Filed: Dec 9, 1993
Inventor
Peter S. Walker
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.