Granted Patent
Utility
US 4,867,809 · App. 07/187,133
Method for making flakes of RE-Fe-B type magnetically aligned material
Inventor:
Jerry Edward Haverstick
Patented Case
View Patent ↗
Granted: Sep 19, 1989
Filed: Apr 28, 1988
Inventor
Jerry Edward Haverstick
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.