Patents by Inventor Yasuzi Kawada

Yasuzi Kawada 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).

  • Welding method for dissimilar metals
    Patent number: 3975612
    Abstract: A method for welding dissimilar metals, wherein a filler metal is deposited on one end of the aforesaid dissimilar metals to be jointed, said filler metal being of the same material as that of another of said dissimilar metals; the outer surface of the weld metal thus deposited is machined to provide a joint surface adapted for welding; and an electron beam welding is applied along the interface formed between said joint surface of said weld metal thus deposited and the joint surface of another of said dissimilar metals.
    Type: Grant
    Filed: June 14, 1974
    Date of Patent: August 17, 1976
    Assignee: Hitachi, Ltd.
    Inventors: Takamitsu Nakazaki, Hisanao Kita, Tatsuo Yonezawa, Yasuzi Kawada, Hisanori Okamura