Granted Patent
Utility
US 4,909,712 · App. 07/268,281
"Electromagnetic fluid pump having ""O"" ring seals to facilitate disassembly"
Inventor:
Harold R. Mortensen
Patented Case
View Patent ↗
Granted: Mar 20, 1990
Filed: Nov 7, 1988
Inventor
Harold R. Mortensen
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.