Granted Patent
Utility
US 4,904,936 · App. 07/171,162
Automotive wheel speed sensor including ferromagnetic flux carrying cup closing an opening in the wheel bearing housing
Inventor:
James W. Richmond
Patented Case
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Granted: Feb 27, 1990
Filed: Mar 21, 1988
Inventor
James W. Richmond
Assignee (at issue)
Emhart Industries, Inc.
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.