TREA

Marcel Roelfsema

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  • Stadskanaal, NL
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Patents Grantslast 30 patents

  • Information Patent Grant

    Infiltration block
    • Patent number 7,712,997
    • Issue date May 11, 2010
    • Wavin B.V.
    • Marcel Roelfsema
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

Patents Applicationslast 30 patents

  • Information Patent Application

    Infiltration Block
    • Publication number 20080044231
    • Publication date Feb 21, 2008
    • Marcel Roelfsema
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL