Granted Patent
Utility
US 6,281,774 · App. 09/554,013
Corrosion-resistant permanent magnet and method for producing the same
Inventors:
Takeshi Nishiuchi, Kohshi Yoshimura, Fumiaki Kikui
Patented Case
View Patent ↗
Granted: Aug 28, 2001
Filed: May 9, 2000
Inventors
Takeshi Nishiuchi
Kohshi Yoshimura
Fumiaki Kikui
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.