Granted Patent
Utility
US 6,074,424 · App. 09/012,532
Implantable knee joint prosthesis convertible from primary to revision
Inventors:
Charles H. Perrone, Jr., Aaron A. Hofmann, Charles W. Mumme
Patented Case
View Patent ↗
Granted: Jun 13, 2000
Filed: Jan 23, 1998
Inventors
Charles H. Perrone, Jr.
Aaron A. Hofmann
Charles W. Mumme
Assignee (at issue)
Sulzer Orthopedics Ltd.
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.