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David C. Campbell

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  • Fife, GB
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Patents Grantslast 30 patents

  • Information Patent Grant

    Electrical appliance control
    • Patent number 4,638,299
    • Issue date Jan 20, 1987
    • Pico Electronics Limited
    • David C. Campbell
    • G05 - CONTROLLING REGULATING
  • Information Patent Grant

    Appliance control
    • Patent number 4,200,862
    • Issue date Apr 29, 1980
    • Pico Electronics Limited
    • David C. Campbell
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE