Patents by Inventor Takaaki Tsukuda

Takaaki Tsukuda 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).

  • Method for manufacture of magnet
    Patent number: 4614929
    Abstract: A method for the manufacture of an annular magnet, which comprises depositing, on the opposite sides of an annular material of magnetic substance, magnetizing members regularly spaced circumferentially in conformity with the shape of said annular material and opposed perpendicularly to each other across said annular material and forming magnetic fluxes through paired magnetizing members in alternately opposite directions thereby magnetizing said interposed annular material.
    Type: Grant
    Filed: March 25, 1985
    Date of Patent: September 30, 1986
    Assignee: Nihon Radiator Co., Ltd.
    Inventors: Takaaki Tsukuda, Toyohiko Hata, Akira Fujisaki