Granted Patent
Utility
US 5,120,915 · App. 07/649,436
Pressure-actuated pump control switch
Inventor:
Robert Doherty
Patented Case
View Patent ↗
Granted: Jun 9, 1992
Filed: Feb 1, 1991
Inventor
Robert Doherty
Assignee (at issue)
Johnson Service Company
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.