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Seiji Okada

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  • Amagasaki, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Hot pressure welding of hot steel stock
    • Patent number 5,509,600
    • Issue date Apr 23, 1996
    • Sumitomo Metal Industries, Ltd.
    • Seiji Okada
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Hot pressure welding of hot steel stock
    • Patent number 5,222,654
    • Issue date Jun 29, 1993
    • Sumitomo Metal Industries, Ltd.
    • Masami Oki
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR