Granted Patent
Utility
US 6,794,838 · App. 10/405,644
Method and system for regulating the power demanded by a rail motor
Inventors:
Jean-Michel Debard, Rong Liu
Patented Case
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Granted: Sep 21, 2004
Filed: Apr 3, 2003
Inventors
Jean-Michel Debard
Rong Liu
Assignee (at issue)
ALSTOM Holdings
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.