Granted Patent
Utility
US 4,591,768 · App. 06/533,850
Control system for an electric motor
Inventor:
Stefan Kudelski
Patented Case
View Patent ↗
Granted: May 27, 1986
Filed: Sep 15, 1983
Inventor
Stefan Kudelski
Assignees (at issue)
Ampex Corporation
Kudelski S.A.
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.