TREA

Hisao Hasegawa

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  • Kobe, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Root pass bead welding method
    • Patent number 5,202,546
    • Issue date Apr 13, 1993
    • Kawasaki Kogyo Kabushiki Kaisha
    • Shigeru Nakayama
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Method for manufacturing welded pipes
    • Patent number 4,916,853
    • Issue date Apr 17, 1990
    • Shigetomo Matsui
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Method of and apparatus for continuous production of seam-welded me...
    • Patent number 4,796,798
    • Issue date Jan 10, 1989
    • Kawasaki Jukogyo Kabushiki Kaisha
    • Toshio Tsuta
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Method for manufacturing welded pipes
    • Patent number 4,717,065
    • Issue date Jan 5, 1988
    • Kawasaki Jukogyo Kabushiki Kaisha
    • Shigetomo Matsui
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...