TREA

Heinrich Jan Roelofs

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  • Como, AU
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Patents Grantslast 30 patents

  • Information Patent Grant

    Tunnel barrier
    • Patent number 8,727,670
    • Issue date May 20, 2014
    • Tagfilm Pty Limited
    • Heinrich Jan Roelofs
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Shaft plugging system
    • Patent number 7,708,070
    • Issue date May 4, 2010
    • Tagfilm Pty Limited
    • Heinrich Jan Roelofs
    • E21 - EARTH DRILLING MINING