Granted Patent
Utility
US 4,589,598 · App. 06/660,522
Apparatus for controlling a variable speed gearmotor
Inventor:
John M. Ellery, Sr.
Patented Case
View Patent ↗
Granted: May 20, 1986
Filed: Oct 12, 1984
Inventor
John M. Ellery, Sr.
Assignee (at issue)
Beloit Corporation
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.