Granted Patent
Utility
US 6,239,999 · App. 08/867,530
Multiple power supply traction system, and a method of Implementation
Inventor:
Serge Mai
Patented Case
View Patent ↗
Granted: May 29, 2001
Filed: Jun 2, 1997
Inventor
Serge Mai
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.