TREA

Franz Powondra

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  • A-1090 Vienna, AT
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Patents Grantslast 30 patents

  • Information Patent Grant

    Yieldable connection
    • Patent number 4,560,305
    • Issue date Dec 24, 1985
    • Franz Powondra
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Force transmission device
    • Patent number 4,431,348
    • Issue date Feb 14, 1984
    • Franz Powondra
    • E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES