TREA

Nils Virving

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  • Vallingby, SE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Refining element of a disc refiner
    • Patent number 5,526,992
    • Issue date Jun 18, 1996
    • Sunds Defibrator Industries Aktiebolag
    • Anders Hawen
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    Method and apparatus for the manufacture of fibre pulp
    • Patent number 5,112,443
    • Issue date May 12, 1992
    • Sunds Defibrator Industries Aktiebolag
    • Nils Virving
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    Refiner segment
    • Patent number 4,953,796
    • Issue date Sep 4, 1990
    • Sunds Defibrator Aktiebolag
    • Nils Virving
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE