Granted Patent
Utility
US 4,295,798 · App. 06/080,767
Automatic two-speed pump assembly
Inventor:
Arthur M. McIntosh
Patented Case
View Patent ↗
Granted: Oct 20, 1981
Filed: Oct 1, 1979
Inventor
Arthur M. McIntosh
Assignee (at issue)
BorgWarner 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.