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David M. A. Kenworthy

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  • South Yorkshire, GB
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Patents Grantslast 30 patents

  • Information Patent Grant

    Pipe joints
    • Patent number 5,255,942
    • Issue date Oct 26, 1993
    • Fusion Group PLC
    • David M. A. Kenworthy
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Method of manufacturing electro-fusion fittings
    • Patent number 5,228,186
    • Issue date Jul 20, 1993
    • Fusion Plastics Ltd.
    • David Brettell
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Electro-fusion fittings
    • Patent number 5,163,713
    • Issue date Nov 17, 1992
    • Fusion Group PLC
    • David Brettell
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Method of making electroweldable sockets
    • Patent number 4,797,993
    • Issue date Jan 17, 1989
    • Fusion Plastics Limited
    • David M. A. Kenworthy
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Fault detecting device for welded pipe joints
    • Patent number 4,795,877
    • Issue date Jan 3, 1989
    • Fusion Plastics Limited
    • Eric Bridgstock
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Electro-fusion fitting and control apparatus therefor
    • Patent number 4,486,650
    • Issue date Dec 4, 1984
    • Fusion Plastics Ltd.
    • Eric Bridgstock
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL