Granted Patent
Utility
US 4,481,440 · App. 06/481,268
Permanent magnet brushless d-c motor with isolated sensor winding means
Inventor:
Rolf Muller
Patented Case
View Patent ↗
Granted: Nov 6, 1984
Filed: Apr 4, 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.