Granted Patent
Utility
US 5,258,672 · App. 07/737,767
Axial retaining means for the rotor shaft of an electric motor
Inventor:
Gunter Wrobel
Patented Case
View Patent ↗
Granted: Nov 2, 1993
Filed: Jul 30, 1991
Inventor
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.