Granted Patent
Utility
US 4,691,133 · App. 06/883,344
Iron-free rotary disk electrical machine
Inventor:
Peter Mongeau
Patented Case
View Patent ↗
Granted: Sep 1, 1987
Filed: Jul 8, 1986
Inventor
Peter Mongeau
Assignee (at issue)
Electromagnetic Launch Research, Inc.
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.