Granted Patent
Utility
US 5,771,931 · App. 08/739,887
High pressure wear resistant pilot valve
Inventor:
Richard R. Watson
Patented Case
View Patent ↗
Granted: Jun 30, 1998
Filed: Oct 31, 1996
Inventor
Richard R. Watson
Assignee (at issue)
GILMORE VALVE COMPANY
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.