Granted Patent
Utility
US 6,597,138 · App. 09/920,150
Method and apparatus for controlling power supplied to a motor
Inventor:
James J. Fitzgibbon
Patented Case
View Patent ↗
Granted: Jul 22, 2003
Filed: Aug 1, 2001
Inventor
James J. Fitzgibbon
Assignee (at issue)
THE CHAMBERLAIN GROUP LLC.
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.