Granted Patent
Utility
US 4,700,746 · App. 06/711,585
Control valve for high pressure fluids
Inventor:
Gayle E. Barb
Patented Case
View Patent ↗
Granted: Oct 20, 1987
Filed: Mar 13, 1985
Inventor
Gayle E. Barb
Assignee (at issue)
Anchor/Darling 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.