Patents by Inventor Kazuo Hamachi

Kazuo Hamachi 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 forming an insulating glass film on surfaces of an oriented silicon steel sheet
    Patent number: 3932237
    Abstract: A highly adhesive and uniform insulating glass film can be formed on surfaces of an oriented silicon steel sheet by pickling a finally cold rolled silicon steel strip just before a decarburizing annealing, and successively subjecting the pickled steel strip to the decarburizing annealing, an application of an annealing separator and a final annealing at a high temperature.
    Type: Grant
    Filed: September 19, 1974
    Date of Patent: January 13, 1976
    Assignee: Kawasaki Steel Corporation
    Inventors: Toshio Irie, Yasuo Yokoyama, Yoshihiko Kameishi, Katsuo Yamaguchi, Kazuo Hamachi