Granted Patent
Utility
US 4,758,768 · App. 07/100,962
12-step commutation device for an electric motor
Inventors:
Howard F. Hendricks, Richard Colin Green
Patented Case
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Granted: Jul 19, 1988
Filed: Sep 25, 1987
Inventors
Howard F. Hendricks
Richard Colin Green
Assignee (at issue)
Penn Engineering & Manufacturing Corp.
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.