Patents by Inventor Katsumi Miyagawa

Katsumi Miyagawa 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).

  • Root pass bead welding method
    Patent number: 5202546
    Abstract: A root pass bead welding method for joining two metal base members includes forming a dike bead by welding on a rear surface of one metal base member, and placing the dike bead against or in the vicinity of a distal end of a rear surface of another metal base member to define a groove open at the front surface of the same. Then welding is performed from the front surface of the other metal base member at the groove to form a root pass bead extending between the dike bead and the rear surface of the other metal base member.
    Type: Grant
    Filed: December 30, 1991
    Date of Patent: April 13, 1993
    Assignee: Kawasaki Kogyo Kabushiki Kaisha
    Inventors: Shigeru Nakayama, Hisao Hasegawa, Masaki Tanaka, Katsumi Miyagawa