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Wilhelmus A. E. M. De Gruijter

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  • Zwijndrecht, BE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Insulating joint for metal pipelines
    • Patent number 4,906,027
    • Issue date Mar 6, 1990
    • Angli Holding B.V.
    • Wilhelmus A. E. M. De Gruijter
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Electrically insulated pipe joint
    • Patent number 4,824,147
    • Issue date Apr 25, 1989
    • Angli Holding B.V.
    • Wilhelmus A. E. M. De Gruijter
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Electrically insulated joint for metal pipes
    • Patent number 4,790,570
    • Issue date Dec 13, 1988
    • Angli Holding B.V.
    • Wilhelmus A. E. M. De Gruijter
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...