Granted Patent
Utility
US 4,859,410 · App. 07/172,666
Die-upset manufacture to produce high volume fractions of RE-Fe-B type magnetically aligned material
Inventors:
Earl G. Brewer, Robert W. Lee
Patented Case
View Patent ↗
Granted: Aug 22, 1989
Filed: Mar 24, 1988
Inventors
Earl G. Brewer
Robert W. Lee
Assignee (at issue)
General Motors 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.