TREA

Michael David Crossfield

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  • Cambridge, GB
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Patents Grantslast 30 patents

  • Information Patent Grant

    Shielded magnetic reading devices
    • Patent number 6,595,419
    • Issue date Jul 22, 2003
    • Flying Null Limited
    • Richard Alan Doyle
    • G06 - COMPUTING CALCULATING COUNTING
  • Information Patent Grant

    Security documents
    • Patent number 6,491,221
    • Issue date Dec 10, 2002
    • Flying Null Limited
    • David Howard Arnold
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Grant

    Magnetic position sensing techniques
    • Patent number 6,486,655
    • Issue date Nov 26, 2002
    • Flying Null Limited
    • Michael D. Crossfield
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Magnetic tags or markers
    • Patent number 6,371,379
    • Issue date Apr 16, 2002
    • Flying Null Limited
    • Andrew Nicholas Dames
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Magnetic interrogation techniques
    • Patent number 6,369,965
    • Issue date Apr 9, 2002
    • Flying Null Limited
    • Andrew Nicholas Dames
    • G06 - COMPUTING CALCULATING COUNTING
  • Information Patent Grant

    Magnetic reading devices
    • Patent number 6,230,972
    • Issue date May 15, 2001
    • Flying Null Limited
    • Andrew Nicholas Dames
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Multi-layer magnetic tag
    • Patent number 6,204,766
    • Issue date Mar 20, 2001
    • Flying Null Limited
    • Michael David Crossfield
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Surgical devices and their location
    • Patent number 6,076,007
    • Issue date Jun 13, 2000
    • Flying Null Limited
    • Mark England
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Magnetic markers
    • Patent number 6,054,924
    • Issue date Apr 25, 2000
    • Flying Null Limited
    • Andrew Nicholas Dames
    • G06 - COMPUTING CALCULATING COUNTING
  • Information Patent Grant

    Methods for coding magnetic tags
    • Patent number 5,965,214
    • Issue date Oct 12, 1999
    • Flying Null Limited
    • Michael David Crossfield
    • G08 - SIGNALLING
  • Information Patent Grant

    Electronic article surveillance system with enhanced geometric arra...
    • Patent number 5,459,451
    • Issue date Oct 17, 1995
    • Esselte Meto International GmbH
    • Michael D. Crossfield
    • G08 - SIGNALLING
  • Information Patent Grant

    Method and system for detecting a marker
    • Patent number 5,414,410
    • Issue date May 9, 1995
    • Esselte Meto International GmbH
    • Daffyd G. Davies
    • G08 - SIGNALLING
  • Information Patent Grant

    Security tag attachment
    • Patent number 5,208,580
    • Issue date May 4, 1993
    • Michael D. Crossfield
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES