Granted Patent
Utility
US 5,047,682 · App. 07/253,937
Permanent magnet excited electric motor
Inventor:
Martin Burgbacher
Patented Case
View Patent ↗
Granted: Sep 10, 1991
Filed: Oct 5, 1988
Inventor
Martin Burgbacher
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.