Granted Patent
Utility
US 5,110,377 · App. 07/523,338
Process for producing permanent magnets and products thereof
Inventors:
Hitoshi Yamamoto, Masato Sagawa, Setsuo Fujimura, Yutaka Matsuura
Patented Case
View Patent ↗
Granted: May 5, 1992
Filed: May 14, 1990
Inventors
Hitoshi Yamamoto
Masato Sagawa
Setsuo Fujimura
Yutaka Matsuura
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.