Granted Patent
Utility
US 4,937,513 · App. 07/179,415
Tapped auxiliary winding for multi-speed operation of electric motor and method therefor
Inventors:
Keith I. Hoemann, Alan R. Barker
Patented Case
View Patent ↗
Granted: Jun 26, 1990
Filed: Apr 8, 1988
Inventors
Keith I. Hoemann
Alan R. Barker
Assignee (at issue)
Emerson Electric Co.
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.