TREA

Oh Y. Choi

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  • Seoul, KR
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Patents Grantslast 30 patents

  • Information Patent Grant

    Barbed wire
    • Patent number 4,317,955
    • Issue date Mar 2, 1982
    • Oh Y. Choi
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...