Granted Patent
Utility
US 5,445,347 · App. 08/062,862
Automated wireless preventive maintenance monitoring system for magnetic levitation (MAGLEV) trains and other vehicles
Inventor:
Joseph Ng
Patented Case
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Granted: Aug 29, 1995
Filed: May 13, 1993
Inventor
Joseph Ng
Assignee (at issue)
Hughes Aircraft Company
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.