Granted Patent
Utility
US 5,110,374 · App. 07/534,185
Rare earth-iron-boron magnet powder and process of producing same
Inventors:
Takuo Takeshita, Ryoji Nakayama, Tamotsu Ogawa
Patented Case
View Patent ↗
Granted: May 5, 1992
Filed: Jun 6, 1990
Inventors
Takuo Takeshita
Ryoji Nakayama
Tamotsu Ogawa
Assignee (at issue)
MITSUBISHI MATERIALS CORPORATION
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.