TREA

Leif Eriksson

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  • Kiruna, SE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Expandable mine bolt
    • Patent number 9,051,831
    • Issue date Jun 9, 2015
    • Hakan Krekula
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

  • Information Patent Application

    ROCK BOLT
    • Publication number 20170298732
    • Publication date Oct 19, 2017
    • Northern Mining Products AB
    • Håkan Krekula
    • E21 - EARTH DRILLING MINING
  • Information Patent Application

    EXPANDABLE MINE BOLT
    • Publication number 20140119839
    • Publication date May 1, 2014
    • Hakan Krekula
    • E21 - EARTH DRILLING MINING