Patents by Inventor Kazumaru Kohira

Kazumaru Kohira 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).

  • Steel wire for gas shielded welding
    Patent number: 4087674
    Abstract: A steel wire for short circuiting gas shielded transfer welding which comprises 0.5 to 1.0% of Si, 1.0 to 2.0% of Mn, not more than 0.015% of P, S and N, respectively, 0.07 to 0.20% of C and not more than 0.020% of total oxygen, the total oxygen being the sum of the oxygen within the wire plus the oxygen adhered to the surface of the wire being more than about 0.004%.
    Type: Grant
    Filed: February 8, 1977
    Date of Patent: May 2, 1978
    Assignee: Nippon Steel Corporation
    Inventors: Kazumaru Kohira, Shiro Aoki, Taizi Nagatani