Granted Patent
Utility
US 6,558,421 · App. 09/664,939
Surgically implantable knee prosthesis
Inventors:
Barry M. Fell, Richard H. Hallock
Patented Case
View Patent ↗
Granted: May 6, 2003
Filed: Sep 19, 2000
Inventors
Barry M. Fell
Richard H. Hallock
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.