Granted Patent
Utility
US 4,374,347 · App. 06/241,059
Brushless d-c motor system
Inventor:
Rolf Muller
Patented Case
View Patent ↗
Granted: Feb 15, 1983
Filed: Mar 6, 1981
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.