Granted Patent
Utility
US 5,331,245 · App. 07/734,443
Permanent magnet excited electric motor with improved torque ripple
Inventors:
Martin Burgbacher, Michael Hermann
Patented Case
View Patent ↗
Granted: Jul 19, 1994
Filed: Jul 23, 1991
Inventors
Martin Burgbacher
Michael Hermann
Assignee (at issue)
Papst Licensing GmbH
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.