Granted Patent
Utility
US 6,039,070 · App. 09/189,613
Pilot operated pressure valve
Inventor:
Bernd Zaehe
Patented Case
View Patent ↗
Granted: Mar 21, 2000
Filed: Nov 9, 1998
Inventor
Bernd Zaehe
Assignee (at issue)
Sun Hydraulics, LLC
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.