Granted Patent
Utility
US 5,851,004 · App. 08/888,583
High pressure actuated metal seated diaphragm valve
Inventors:
Jing-Chau Wu, Patrick P. Barber, Lewis L. Aldridge
Patented Case
View Patent ↗
Granted: Dec 22, 1998
Filed: Jul 7, 1997
Inventors
Jing-Chau Wu
Patrick P. Barber
Lewis L. Aldridge
Assignee (at issue)
Parker-Hannifin Corporation
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.