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David Richard Hallam

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  • Denton, Manchester, GB
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Patents Grantslast 30 patents

  • Information Patent Grant

    Air cleaning device
    • Patent number 8,211,374
    • Issue date Jul 3, 2012
    • David Richard Hallam
    • B03 - SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES O...
  • Information Patent Grant

    Air filtration device
    • Patent number 7,449,053
    • Issue date Nov 11, 2008
    • David Richard Hallam
    • F24 - HEATING RANGES VENTILATING

Patents Applicationslast 30 patents

  • Information Patent Application

    Air filtration device
    • Publication number 20070086932
    • Publication date Apr 19, 2007
    • David Richard Hallam
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Application

    Air cleaning device
    • Publication number 20060182672
    • Publication date Aug 17, 2006
    • David Richard Hallam
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE