Granted Patent
Utility
US 4,544,852 · App. 06/410,969
Circuit arrangement for monitoring speed of a drive motor
Inventors:
Helmut Moosmann, Rolf Muller
Patented Case
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Granted: Oct 1, 1985
Filed: Aug 24, 1982
Inventors
Helmut Moosmann
Rolf Muller
Assignee (at issue)
Papst Motoren GmbH & Co KG
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.