Granted Patent
Utility
US 6,046,554 · App. 09/023,725
Method and apparatus for calibrating a permanent-magnet motor using back EMF measurement
Inventor:
Roger Carlos Becerra
Patented Case
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Granted: Apr 4, 2000
Filed: Feb 13, 1998
Inventor
Roger Carlos Becerra
Assignee (at issue)
General Electric Company
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.