Granted Patent
Utility
US 6,817,845 · App. 10/126,720
Centrifugal pump with switched reluctance motor drive
Inventors:
Thomas L. Angle, Steven D. Osborn
Patented Case
View Patent ↗
Granted: Nov 16, 2004
Filed: Apr 19, 2002
Inventors
Thomas L. Angle
Steven D. Osborn
Assignee (at issue)
Envirotech Pumpsystems, 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.