Granted Patent
Utility
US 4,354,713 · App. 06/206,524
Dual area metering valve with variable reaction assembly
Inventor:
Norman Edwards
Patented Case
View Patent ↗
Granted: Oct 19, 1982
Filed: Nov 13, 1980
Inventor
Norman Edwards
Assignee (at issue)
Echlin, 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.