Granted Patent
Utility
US 4,807,657 · App. 07/187,709
Automatic fluid flow regulator
Inventor:
Hugo H. van den Bergh
Patented Case
View Patent ↗
Granted: Feb 28, 1989
Filed: Apr 29, 1988
Inventor
Hugo H. van den Bergh
Assignee (at issue)
General Dynamics Corporation, Convair Division
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.