Granted Patent
Utility
US 4,501,997 · App. 06/457,744
Magnetization for brushless direct current outer rotor motor
Inventor:
Rolf Muller
Patented Case
View Patent ↗
Granted: Feb 26, 1985
Filed: Jan 14, 1983
Inventor
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.