Patents by Inventor Sumio Yuda

Sumio Yuda 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).

  • Magnetic materials
    Patent number: 4008105
    Abstract: In magnet alloy of spinodal decomposition type comprising Fe-Cr-Co or Fe-Cr-Co-Si system, magnetic materials containing Zr in an amount from 0.03 to 3.5%.Such magnetic materials are embodied by containing Zr in an amount from 0.03 to 3.5% by weight in an alloy system comprising Co from 10 to 35% and Cr from 25 to 40%, the balance being Fe or in an alloy system comprising Co from 10 to 35%, Cr from 25 to 40% and Si from 0.3 to 2.0%, the balance being Fe.
    Type: Grant
    Filed: April 22, 1975
    Date of Patent: February 15, 1977
    Assignee: Warabi Special Steel Co., Ltd.
    Inventors: Sumio Yuda, Tohru Sawada, Kohji Moriya