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Gunnar Parmann

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  • Mathopen, NO
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Patents Grantslast 30 patents

  • Information Patent Grant

    Reinforced sealing rings for pipe joints
    • Patent number 4,368,894
    • Issue date Jan 18, 1983
    • Rieber & Son
    • Gunnar Parmann
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Combined mould element and sealing ring
    • Patent number 4,120,521
    • Issue date Oct 17, 1978
    • Rieber & Son Plastic-Industri A/S
    • Gunnar Parmann
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Combined mold element and sealing ring
    • Patent number 4,061,459
    • Issue date Dec 6, 1977
    • Gunnar Parmann
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Combined mould element and sealing ring
    • Patent number 4,030,872
    • Issue date Jun 21, 1977
    • Rieber & Son Plastic-Industri A/S
    • Gunnar Parmann
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...