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David William Birch

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  • Bordon, GB
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Patents Grantslast 30 patents

  • Information Patent Grant

    Cylinder valve
    • Patent number 7,594,639
    • Issue date Sep 29, 2009
    • The BOC Group plc
    • David William Birch
    • F17 - STORING OF DISTRIBUTING GASES OR LIQUIDS
  • Information Patent Grant

    Production of constant composition gas mixture streams
    • Patent number 6,382,227
    • Issue date May 7, 2002
    • The BOC Group, Inc.
    • David W. Birch
    • F17 - STORING OF DISTRIBUTING GASES OR LIQUIDS
  • Information Patent Grant

    Valve for use with high purity gas
    • Patent number 6,361,020
    • Issue date Mar 26, 2002
    • The BOC Group plc
    • David William Birch
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Gas capsule and gas delivery system
    • Patent number 6,047,865
    • Issue date Apr 11, 2000
    • The BOC Group plc
    • Evelyn A. Shervington
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Grant

    Gas delivery system
    • Patent number 5,954,232
    • Issue date Sep 21, 1999
    • The BOC Group plc
    • Evelyn A. Shervington
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Grant

    Gas capsule
    • Patent number 5,845,811
    • Issue date Dec 8, 1998
    • The BOC Group plc
    • Evelyn A. Shervington
    • F17 - STORING OF DISTRIBUTING GASES OR LIQUIDS
  • Information Patent Grant

    Pressure reduction valve
    • Patent number 5,732,735
    • Issue date Mar 31, 1998
    • The BOC Group plc
    • David William Birch
    • F17 - STORING OF DISTRIBUTING GASES OR LIQUIDS

Patents Applicationslast 30 patents

  • Information Patent Application

    Cylinder valve
    • Publication number 20060138376
    • Publication date Jun 29, 2006
    • David William Birch
    • F17 - STORING OF DISTRIBUTING GASES OR LIQUIDS