Granted Patent
Utility
US 4,392,098 · App. 06/311,842
RPM Sensor for electronic motor braking
Inventor:
Young-Kee Min
Patented Case
View Patent ↗
Granted: Jul 5, 1983
Filed: Oct 16, 1981
Inventor
Young-Kee Min
Assignee (at issue)
PT Components, 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.