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Kazumi Isaka

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  • Amagasaki, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Hearth roller with suppressed heat crown
    • Patent number 5,547,450
    • Issue date Aug 20, 1996
    • Sumitomo Metal Industries, Ltd.
    • Yoshiro Matsumoto
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Butt welding method
    • Patent number 4,912,295
    • Issue date Mar 27, 1990
    • Sumitomo Metal Industries, Ltd.
    • Kazushige Arimochi
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR