TREA

Hirohisa Nakashima

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Filler sand for a ladle tap hole valve
    • Patent number 6,316,106
    • Issue date Nov 13, 2001
    • NKK Corporation
    • Hideto Takasugi
    • B22 - CASTING POWDER METALLURGY
  • Information Patent Grant

    Sliding nozzle filler
    • Patent number 6,051,514
    • Issue date Apr 18, 2000
    • Yamakawa Sangyo Co., Ltd.
    • Jun Ayama
    • B22 - CASTING POWDER METALLURGY