Granted Patent
Utility
US 5,728,174 · App. 08/532,627
Swing phase control for an artificial knee joint
Inventor:
Gerhard Fitzlaff
Patented Case
View Patent ↗
Granted: Mar 17, 1998
Filed: Oct 3, 1995
Inventor
Gerhard Fitzlaff
Assignee (at issue)
Biedermann Motech GmbH
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.