Granted Patent
Utility
US 5,670,852 · App. 08/408,592
Pump motor and motor control
Inventors:
Keith E. Chipperfield, Kevin D. O'Hara, Greg Kangiser, Steve Soar
Patented Case
View Patent ↗
Granted: Sep 23, 1997
Filed: Mar 22, 1995
Inventors
Keith E. Chipperfield
Kevin D. O'Hara
Greg Kangiser
Steve Soar
Assignee (at issue)
Micropump, 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.