Patents by Inventor Keizou Otani

Keizou Otani has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • RARE EARTH PERMANENT MAGNET ALLOY AND PRODUCING METHOD THEREOF
    Publication number: 20090081071
    Abstract: A rare earth permanent magnet alloy with a high coercive force is disclosed. The rare earth permanent magnet alloy comprises: a rare earth-iron-boron type magnetic phase (R2Fe14B type magnetic phase) constituting a parent phase; and a defect structure. The parent phase contains the defect structure. Displacement of magnetic domain wall of the R2Fe14B type magnetic phase is prevented by the defect structure, thereby improving coercive force.
    Type: Application
    Filed: September 9, 2008
    Publication date: March 26, 2009
    Inventors: Hiroshi YAMAMOTO, Tetsurou Tayu, Masashi Ohmura, Keizou Otani, Takao Yabumi, Hayato Hashino