Granted Patent
Utility
US 4,429,245 · App. 06/321,632
External rotor production for synchronous hysteresis motor
Inventors:
Siegfried Muller, Gunter Wrobel
Patented Case
View Patent ↗
Granted: Jan 31, 1984
Filed: Nov 16, 1981
Inventors
Siegfried Muller
Gunter Wrobel
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.