Granted Patent
Utility
US 6,403,024 · App. 09/503,738
Hydrogen pulverizer for rare-earth alloy magnetic material powder using the pulverizer, and method for producing magnet using the pulverizer
Inventors:
Akiyasu Oota, Akihito Tsujimoto, Katsumi Okayama
Patented Case
View Patent ↗
Granted: Jun 11, 2002
Filed: Feb 15, 2000
Inventors
Akiyasu Oota
Akihito Tsujimoto
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.