Granted Patent
Utility
US 4,990,809 · App. 07/043,092
Variable reluctance motor
Inventors:
Richard J. Artus, Anthony E. Balestro, Allen R. Perrins, Peter Senak, Jr.
Patented Case
View Patent ↗
Granted: Feb 5, 1991
Filed: Apr 27, 1987
Inventors
Richard J. Artus
Anthony E. Balestro
Allen R. Perrins
Peter Senak, Jr.
Assignee (at issue)
Superior Electron, LLC
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.