TREA

Yasuo Umekawa

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  • Chiba, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Package of containers
    • Patent number D330160
    • Issue date Oct 13, 1992
    • Koatsu Gas Kogyo Co., Ltd.
    • Yasuo Umekawa
    • D09 - Packages and containers for goods
  • Information Patent Grant

    Two piece container cap
    • Patent number D309716
    • Issue date Aug 7, 1990
    • Koatsu Gas Kogyo Co., Ltd.
    • Yasuo Umekawa
    • D09 - Packages and containers for goods