TREA

Yoshitaka Ojiro

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  • Isehara, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Hydraulic rock splitter
    • Patent number 4,571,002
    • Issue date Feb 18, 1986
    • Kabushiki Kaisha Komatsu Seisakusho
    • Shigetake Akanuma
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Apparatus for mechanically breaking up rock
    • Patent number 4,566,736
    • Issue date Jan 28, 1986
    • Kabushiki Kaisha Komatsu Seisakusho
    • Shigetake Akanuma
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Power-driven, wedge-operated rock splitter
    • Patent number 4,474,410
    • Issue date Oct 2, 1984
    • Kabushiki Kaisha Komatsu Seisakusho
    • Koji Ogaki
    • B28 - WORKING CEMENT, CLAY, OR STONE