Granted Patent
Utility
US 5,167,914 · App. 07/704,100
Rare earth magnet having excellent corrosion resistance
Inventors:
Setsuo Fujimura, Masato Sagawa, Hitoshi Yamamoto, Satoshi Hirosawa
Patented Case
View Patent ↗
Granted: Dec 1, 1992
Filed: May 22, 1991
Inventors
Setsuo Fujimura
Masato Sagawa
Hitoshi Yamamoto
Satoshi Hirosawa
Assignee (at issue)
Sumitomo Special Metals Co., Ltd.
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.