Granted Patent
Utility
US 6,427,721 · App. 09/609,843
Hydraulic valve arrangement with locking function
Inventors:
Siegfried Zenker, Carsten Christensen, Thorkild Christensen
Patented Case
View Patent ↗
Granted: Aug 6, 2002
Filed: Jul 5, 2000
Inventors
Siegfried Zenker
Carsten Christensen
Thorkild Christensen
Assignee (at issue)
Sauer-Danfoss (Nordberg) 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.