Granted Patent
Utility
US 6,067,237 · App. 09/137,142
Reversible direct current power converter device capable of providing output voltages greater than the floating voltage of the secondary winding of the transformer
Inventor:
Uyen Nguyen
Patented Case
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Granted: May 23, 2000
Filed: Aug 20, 1998
Inventor
Uyen Nguyen
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.