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James S. Campbell

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  • Orinda, CA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Vertical-axis windmill of the Chinese type
    • Patent number 4,364,710
    • Issue date Dec 21, 1982
    • James Campbell
    • F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
  • Information Patent Grant

    Vertical axis windmill
    • Patent number 4,197,055
    • Issue date Apr 8, 1980
    • James S. Campbell
    • F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...