Granted Patent
Utility
US 5,221,368 · App. 07/735,893
Method of obtaining a magnetic material of the rare earth/transition metals/boron type in divided form for corrosion-resistant magnets
Inventors:
Armand Gabriel, Masato Sagawa, Philippe Tenaud, Pierre P. Turillon, Fernand Vial
Patented Case
View Patent ↗
Granted: Jun 22, 1993
Filed: Jul 25, 1991
Inventors
Armand Gabriel
Masato Sagawa
Philippe Tenaud
Pierre P. Turillon
Fernand Vial
Assignee (at issue)
Aimants Ugimag
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.