TREA

Sumitomo Metal Industries, Ltc.

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  • Osaka, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Process for producing high-strength seamless steel pipe having exce...
    • Patent number 5,938,865
    • Issue date Aug 17, 1999
    • Sumitomo Metal Industries, Ltc.
    • Kunio Kondo
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Tandem mill
    • Patent number 4,658,620
    • Issue date Apr 21, 1987
    • Sumitomo Metal Industries, Ltc.
    • Takeshi Masui
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...