Granted Patent
Utility
US 6,330,798 · App. 09/573,751
Hydraulic system with shadow poppet valve
Inventor:
Dwight B. Stephenson
Patented Case
View Patent ↗
Granted: Dec 18, 2001
Filed: May 18, 2000
Inventor
Dwight B. Stephenson
Assignee (at issue)
HUSCO International, Inc.
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.