Patents by Inventor Sadao Ohishibashi

Sadao Ohishibashi 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 welding hard metal
    Patent number: 4306139
    Abstract: Disclosed is a method for welding wear-resisting hard metals directly to iron base members which are slide or wear members of machinery. Hard metals comprising a tungsten carbide and a binder consisting of 15 to 30% by weight of Ni and/or Co is employed as said hard metals. A Ni alloy metal containing no Cr is used as a filler metal.
    Type: Grant
    Filed: December 26, 1979
    Date of Patent: December 15, 1981
    Assignee: Ishikawajima-Harima Jukogyo Kabushiki Kaisha
    Inventors: Yukio Shinozaki, Katsutoshi Naruse, Teruo Harada, Sadao Ohishibashi, Susumu Yamaya, Akira Fukawa