Granted Patent
Utility
US 4,920,009 · App. 07/233,699
Method for producing laminated bodies comprising an RE-FE-B type magnetic layer and a metal backing layer
Inventors:
Robert W. Lee, Earl G. Brewer
Patented Case
View Patent ↗
Granted: Apr 24, 1990
Filed: Aug 5, 1988
Inventors
Robert W. Lee
Earl G. Brewer
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.