Granted Patent
Utility
US 4,954,186 · App. 07/177,094
Rear earth-iron-boron permanent magnets containing aluminum
Inventor:
Mohammad H. Ghandehari
Patented Case
View Patent ↗
Granted: Sep 4, 1990
Filed: Apr 4, 1988
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.