Granted Patent
Utility
US 5,338,371 · App. 07/978,911
Rare earth permanent magnet powder, method for producing same and bonded magnet
Inventors:
Ryoji Nakayama, Takuo Takeshita, Tamotsu Ogawa
Patented Case
View Patent ↗
Granted: Aug 16, 1994
Filed: Nov 19, 1992
Inventors
Ryoji Nakayama
Takuo Takeshita
Tamotsu Ogawa
Assignee (at issue)
Mitsubishi Metal 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.