Granted Patent
Utility
US 6,537,385 · App. 10/190,733
Rare earth magnet and method for manufacturing the same
Inventors:
Katsumi Okayama, Naoyuki Ishigaki, Shuhei Okumura
Patented Case
View Patent ↗
Granted: Mar 25, 2003
Filed: Jul 9, 2002
Inventors
Katsumi Okayama
Naoyuki Ishigaki
Shuhei Okumura
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.