Patents by Inventor Naohisa Tomoda

Naohisa Tomoda 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).

  • Multipolarly magnetized magnet
    Patent number: 4702852
    Abstract: There is provided a multipolarly magnetized anisotropic plastics magnet formed by molding, followed by solidifying, a composition composed of a magnetic powder and an organic binder in the presence of a magnetic field, and subsequently multipolarly magnetizing the thus obtained anisotropic plastics magnet, said magnetic powder being magnetoplumbite ferrite which is characterized by that the green density is not less than 3.1 g/cm.sup.3 and the intrinsic coercive force of the green compact is not more than 2500 oersteds. The plastics magnet is useful as an anisotropic plastics magnet rotor having a great value of surface magnetic field.
    Type: Grant
    Filed: February 12, 1987
    Date of Patent: October 27, 1987
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Takashi Sakauchi, Fumihiko Mohri, Naohisa Tomoda, Satoshi Nakatsuka