Granted Patent
Utility
US 6,328,275 · App. 09/658,843
Bidirectional pilot operated control valve
Inventors:
Xiaolong Yang, Dwight B. Stephenson, Michael J. Paik
Patented Case
View Patent ↗
Granted: Dec 11, 2001
Filed: Sep 8, 2000
Inventors
Xiaolong Yang
Dwight B. Stephenson
Michael J. Paik
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.