Granted Patent
Utility
US 4,209,861 · App. 05/880,057
Joint prosthesis
Inventors:
Peter S. Walker, Rocco R. Borzone
Patented Case
View Patent ↗
Granted: Jul 1, 1980
Filed: Feb 22, 1978
Inventors
Peter S. Walker
Rocco R. Borzone
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.