Patents by Inventor Testushi Yamamoto

Testushi Yamamoto 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 stabilization treatment of ferromagnetic metal powder
    Patent number: 5116437
    Abstract: A method of treating ferromagnetic metal powder to achieve a uniform stable oxide coating is provided, comprising:(a) molding ferromagnetic metal powder into granules having a minimum diameter of 0.
    Type: Grant
    Filed: September 27, 1990
    Date of Patent: May 26, 1992
    Assignee: Chisso Corporation
    Inventors: Testushi Yamamoto, Masaru Niwano, Etsuo Nakagawa