TREA

Wilhelm Wertelewski

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  • Datteln, DT
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Patents Grantslast 30 patents

  • Information Patent Grant

    Roof bar for surface support elements
    • Patent number 4,092,831
    • Issue date Jun 6, 1978
    • Becorit Grubenausbau GmbH
    • Walter Lubojatsky
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof support
    • Patent number 3,996,753
    • Issue date Dec 14, 1976
    • Becorit Grubenausbau GmbH
    • Walter Lubojatsky
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine support assemblies
    • Patent number 3,971,225
    • Issue date Jul 27, 1976
    • Becorit Grubenausbau GmbH
    • Wilhelm Wertelewski
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof shield
    • Patent number 3,949,563
    • Issue date Apr 13, 1976
    • Becorit Grubenausbau GmbH
    • Wilhelm Wertelewski
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof support
    • Patent number 3,932,998
    • Issue date Jan 20, 1976
    • Becorit Grubenausbau GmbH
    • Walter Lubojatsky
    • E21 - EARTH DRILLING MINING