Granted Patent
Utility
US 4,613,778 · App. 06/644,142
Electric motors
Inventors:
Gunter Wrobel, Ulrich Koletzki
Patented Case
View Patent ↗
Granted: Sep 23, 1986
Filed: Aug 24, 1984
Inventors
Gunter Wrobel
Ulrich Koletzki
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.