Granted Patent
Utility
US 5,220,258 · App. 07/932,737
Drive circuit for a brushless direct-current motor
Inventors:
Helmut Hans, Mojtaba Moini
Patented Case
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Granted: Jun 15, 1993
Filed: Aug 25, 1992
Inventors
Helmut Hans
Mojtaba Moini
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.