Granted Patent
Utility
US 5,070,905 · App. 07/530,097
Directional flow control
Inventor:
Joseph R. Paradis
Patented Case
View Patent ↗
Granted: Dec 10, 1991
Filed: May 29, 1990
Inventor
Joseph R. Paradis
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.