Granted Patent
Utility
US 5,230,749 · App. 07/728,037
Permanent magnets
Inventors:
Setsuo Fujimura, Masato Sagawa, Yutaka Matsuura, Hitoshi Yamamoto, Norio Togawa
Patented Case
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Granted: Jul 27, 1993
Filed: Jul 8, 1991
Inventors
Setsuo Fujimura
Masato Sagawa
Yutaka Matsuura
Hitoshi Yamamoto
Norio Togawa
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.