Patents by Inventor Akinobu Kojima

Akinobu Kojima 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).

  • Hard magnetic materials and method of producing the same
    Patent number: 6004407
    Abstract: Hard magnetic materials of the present invention contain at least one element of Fe, Co and Ni as a main component, at least one element M of Zr, Nb, Ta and Hf, at least one rare earth element R and B. The texture of the materials has at least 70% of fine crystalline phase having an average grain size of 100 nm or less, and the residue having an amorphous phase, the fine crystalline phase mainly composed of bcc-Fe or bcc-Fe compound, Fe--B compound and/or R.sub.2 Fe.sub.14 B.sub.1.
    Type: Grant
    Filed: September 20, 1996
    Date of Patent: December 21, 1999
    Assignees: Alps Electric Co., Ltd., Akihisa Inoue, Tsuyoshi Masumoto
    Inventors: Akinobu Kojima, Akihiro Makino, Akihisa Inoue, Tsuyoshi Masumoto