Granted Patent
Utility
US 5,250,206 · App. 07/763,432
Rare earth element-Fe-B or rare earth element-Fe-Co-B permanent magnet powder excellent in magnetic anisotropy and corrosion resistivity and bonded magnet manufactured therefrom
Inventors:
Ryoji Nakayama, Takuo Takeshita, Tamotsu Ogawa
Patented Case
View Patent ↗
Granted: Oct 5, 1993
Filed: Sep 19, 1991
Inventors
Ryoji Nakayama
Takuo Takeshita
Tamotsu Ogawa
Assignee (at issue)
MITSUBISHI MATERIALS CORPORATION
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.