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Ryuji Hamada

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  • Iaraki-ken, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Method and apparatus for rolling a strip
    • Patent number 6,216,505
    • Issue date Apr 17, 2001
    • Sumitomo Metal Industries, Ltd.
    • Shinichiro Hiramatsu
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Cold rolling method for a metal strip and a mill array
    • Patent number 5,636,544
    • Issue date Jun 10, 1997
    • Sumitomo Metal Industries, Ltd.
    • Atsushi Tomizawa
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...