Granted Patent
Utility
US 6,763,851 · App. 09/979,568
Rotary shift valve for servo-assisted steering systems of motor vehicles
Inventors:
Werner Breitweg, Rainer Schanzel
Patented Case
View Patent ↗
Granted: Jul 20, 2004
Filed: Jan 17, 2002
Inventors
Werner Breitweg
Rainer Schanzel
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.