Granted Patent
Utility
US 6,202,811 · App. 09/402,774
Clutch
Inventor:
Werner Wallrafen
Patented Case
View Patent ↗
Granted: Mar 20, 2001
Filed: Dec 23, 1999
Inventor
Werner Wallrafen
Assignee (at issue)
Mannesmann VDO AG
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.