Granted Patent
Utility
US 6,629,420 · App. 09/919,087
Method and device for testing and diagnosing air-conditioning apparatus on vehicles
Inventor:
Marie Joseph Renders
Patented Case
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Granted: Oct 7, 2003
Filed: Jul 31, 2001
Inventor
Marie Joseph Renders
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.