Granted Patent
Utility
US 4,230,976 · App. 06/042,362
Brushless, permanent magnet d-c motor with improved commutation control
Inventor:
Rolf Muller
Patented Case
View Patent ↗
Granted: Oct 28, 1980
Filed: May 25, 1979
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.