Granted Patent
Utility
US 4,904,236 · App. 07/189,761
Fluid flow control valve
Inventors:
Russell J. Redmond, Claude Vidal
Patented Case
View Patent ↗
Granted: Feb 27, 1990
Filed: May 3, 1988
Inventors
Russell J. Redmond
Claude Vidal
Assignee (at issue)
VIR Engineering, 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.