Granted Patent
Utility
US 6,612,336 · App. 09/744,408
Rotary shift valve for servo-assisted steering systems of motor vehicles
Inventors:
Jens-Uwe Hafermalz, Peter Ertle, Karl-Heinz Urban
Patented Case
View Patent ↗
Granted: Sep 2, 2003
Filed: Mar 5, 2001
Inventors
Jens-Uwe Hafermalz
Peter Ertle
Karl-Heinz Urban
Assignee (at issue)
ZF Lenksysteme 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.