Granted Patent
Utility
US 4,881,985 · App. 07/228,435
Method for producing anisotropic RE-FE-B type magnetically aligned material
Inventors:
Earl G. Brewer, Robert W. Lee, John J. Croat
Patented Case
View Patent ↗
Granted: Nov 21, 1989
Filed: Aug 5, 1988
Inventors
Earl G. Brewer
Robert W. Lee
John J. Croat
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.