Granted Patent
Utility
US 6,181,127 · App. 09/304,390
Method and circuit for checking the width of the air gap in a speed sensor
Inventor:
Werner Wallrafen
Patented Case
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Granted: Jan 30, 2001
Filed: May 4, 1999
Inventor
Werner Wallrafen
Assignee (at issue)
Mannesmann VDO AG
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.