Granted Patent
Utility
US 4,343,597 · App. 06/139,516
Reciprocating fluid pump having a hall switch
Inventor:
Ralph V. Brown
Patented Case
View Patent ↗
Granted: Aug 10, 1982
Filed: Apr 11, 1980
Inventor
Ralph V. Brown
Assignee (at issue)
Facet Enterprises, Incorporated
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.