Granted Patent
Utility
US 6,612,321 · App. 09/787,589
Damping valve for power steering
Inventor:
Peter Ertle
Patented Case
View Patent ↗
Granted: Sep 2, 2003
Filed: Mar 19, 2001
Inventor
Peter Ertle
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.