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Hiraoka Giken Kogyo Co., Ltd.

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  • Saitama, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Apparatus for molding a concrete pipe
    • Patent number 4,360,331
    • Issue date Nov 23, 1982
    • Hiraoka Giken Kogyo Co., Ltd.
    • Kunizo Hiraoka
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    Process for molding a concrete pipe
    • Patent number 4,311,632
    • Issue date Jan 19, 1982
    • Hiraoka Giken Kogyo Co., Ltd.
    • Kunizo Hiraoka
    • B28 - WORKING CEMENT, CLAY, OR STONE