Granted Patent
Utility
US 4,842,656 · App. 07/062,533
Anisotropic neodymium-iron-boron powder with high coercivity
Inventors:
James R. Maines, David E. Arnold, III
Patented Case
View Patent ↗
Granted: Jun 27, 1989
Filed: Jun 12, 1987
Inventors
James R. Maines
David E. Arnold, III
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.