Granted Patent
Utility
US 4,825,857 · App. 06/837,200
Prosthetic knee implantation
Inventor:
Robert V. Kenna
Patented Case
View Patent ↗
Granted: May 2, 1989
Filed: Mar 10, 1986
Inventor
Robert V. Kenna
Assignee (at issue)
Howmedica 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.