Granted Patent
Utility
US 6,712,176 · App. 09/749,840
Hydraulic dual circuit steering system
Inventors:
Siegfried Zenker, Carsten Christensen
Patented Case
View Patent ↗
Granted: Mar 30, 2004
Filed: Dec 27, 2000
Inventors
Siegfried Zenker
Carsten Christensen
Assignee (at issue)
Sauer-Danfoss Holding A/S
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.