Granted Patent
Utility
US 4,365,645 · App. 06/293,990
Three-way flow-regulating valve
Inventor:
Walter Wohlrab
Patented Case
View Patent ↗
Granted: Dec 28, 1982
Filed: Aug 18, 1981
Inventor
Walter Wohlrab
Assignee (at issue)
KraussMaffei GmbH
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.