Granted Patent
Utility
US 4,747,874 · App. 06/869,045
Rare earth-iron-boron permanent magnets with enhanced coercivity
Inventor:
Mohammad H. Ghandehari
Patented Case
View Patent ↗
Granted: May 31, 1988
Filed: May 30, 1986
Inventor
Mohammad H. Ghandehari
Assignee (at issue)
Union Oil Company of California
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.