Granted Patent
Utility
US 6,743,394 · App. 10/173,786
Case for use in sintering process to produce rare-earth magnet, and method for producing rare-earth magnet
Inventors:
Akiyasu Oota, Tsuyoshi Wada, Katsumi Okayama
Patented Case
View Patent ↗
Granted: Jun 1, 2004
Filed: Jun 19, 2002
Inventors
Akiyasu Oota
Tsuyoshi Wada
Katsumi Okayama
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.