Granted Patent
Utility
US 4,330,740 · App. 06/079,852
Energizing circuit for providing low voltage starting for submersible pump motor
Inventors:
Lewis R. Shell, Joseph E. Vandevier
Patented Case
View Patent ↗
Granted: May 18, 1982
Filed: Sep 28, 1979
Inventors
Lewis R. Shell
Joseph E. Vandevier
Assignee (at issue)
Centrilift-Hughes, 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.