Granted Patent
Utility
US 5,116,338 · App. 07/645,388
Apparatus for knee prosthesis
Inventors:
Matthew P. Poggie, Peter S. Walker, Frederick C. Ewald
Patented Case
View Patent ↗
Granted: May 26, 1992
Filed: Jan 24, 1991
Inventors
Matthew P. Poggie
Peter S. Walker
Frederick C. Ewald
Assignee (at issue)
Pfizer Hospital Products Group, 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.