Granted Patent
Utility
US 4,485,727 · App. 06/459,173
Pressure pilot switch point device
Inventor:
David W. Shollenbarger
Patented Case
View Patent ↗
Granted: Dec 4, 1984
Filed: Jan 19, 1983
Inventor
David W. Shollenbarger
Assignee (at issue)
Fisher Controls International LLC
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.