TREA

Christopher J. Mitchell

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  • Warminster, GB
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Patents Grantslast 30 patents

  • Information Patent Grant

    Data authentication and protection system
    • Patent number 4,933,969
    • Issue date Jun 12, 1990
    • Hewlett-Packard Company
    • Alan D. Marshall
    • G06 - COMPUTING CALCULATING COUNTING
  • Information Patent Grant

    Secure messaging systems
    • Patent number 4,888,800
    • Issue date Dec 19, 1989
    • Hewlett-Packard Company
    • Alan D. Marshall
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Secure messaging systems
    • Patent number 4,866,707
    • Issue date Sep 12, 1989
    • Hewlett-Packard Company
    • Alan D. Marshall
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE