Granted Patent
Utility
US 4,217,666 · App. 06/027,518
Tibial prosthesis having a U-shaped intramedullary stem
Inventor:
Robert G. Averill
Patented Case
View Patent ↗
Granted: Aug 19, 1980
Filed: Apr 5, 1979
Inventor
Robert G. Averill
Assignee (at issue)
Minnesota Mining and Manufacturing Company
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.