Granted Patent
Utility
US 6,432,158 · App. 09/691,266
Method and apparatus for producing compact of rare earth alloy powder and rare earth magnet
Inventors:
Tsutomu Harada, Hitoshi Morimoto, Atsuo Tanaka
Patented Case
View Patent ↗
Granted: Aug 13, 2002
Filed: Oct 19, 2000
Inventors
Tsutomu Harada
Hitoshi Morimoto
Atsuo Tanaka
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.