Patents by Inventor Hisao Yasumura

Hisao Yasumura 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).

  • Soft-magnetic nickel-iron-chromium alloy for magnetic cores
    Patent number: 5135588
    Abstract: A Ni-Fe-Cr soft magnetic alloy essentially consisting of 40-50% Ni, 0.5-5% Cr and balance Fe and satisfying the following conditions:50.ltoreq.(Ni%)+4.times.(Cr%).ltoreq.60;S+O+B.ltoreq.0.008%;S.ltoreq.0.003%;O.ltoreq.0.005%; andB.ltoreq.0.005%;has excellent magnetic characteristics for magnetic core materials.
    Type: Grant
    Filed: March 12, 1991
    Date of Patent: August 4, 1992
    Assignee: Nisshin Steel Company Ltd.
    Inventors: Takuji Okiyama, Takuji Hara, Hisao Yasumura, Yutaka Kawai