Granted Patent
Utility
US 5,675,244 · App. 08/345,460
Power-supply apparatus for powering a control circuit for controlling a power switch component
Inventor:
Michel Piton
Patented Case
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Granted: Oct 7, 1997
Filed: Nov 21, 1994
Inventor
Michel Piton
Assignee (at issue)
GEC Alsthom Transport SA
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.