TREA

Bjorn Andersson

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  • Bromma, SE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Air valve
    • Patent number 5,983,929
    • Issue date Nov 16, 1999
    • AB Durgo
    • Bjorn Andersson
    • E03 - WATER SUPPLY SEWERAGE
  • Information Patent Grant

    Air-ventilating valve
    • Patent number 5,881,759
    • Issue date Mar 16, 1999
    • AB Durgo
    • Bjorn Andersson
    • E03 - WATER SUPPLY SEWERAGE