Granted Patent
Utility
US 4,574,211 · App. 06/391,145
Brushless D.C. motor
Inventors:
Rolf Muller, Reinhold Wurdak
Patented Case
View Patent ↗
Granted: Mar 4, 1986
Filed: Jun 23, 1982
Inventors
Rolf Muller
Reinhold Wurdak
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.