Granted Patent
Utility
US 4,641,422 · App. 06/660,601
Method of making a permanent magnet rotor for a synchronous motor
Inventor:
Robert F. Weaver
Patented Case
View Patent ↗
Granted: Feb 10, 1987
Filed: Mar 16, 1984
Inventor
Robert F. Weaver
Assignee (at issue)
Emhart Industries, 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.