TREA

John R. Gruber

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  • Cleveland, OH, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Current generator
    • Patent number 4,388,547
    • Issue date Jun 14, 1983
    • John R. Gruber
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Shell rotor direct current generator
    • Patent number 4,051,402
    • Issue date Sep 27, 1977
    • John R. Gruber
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER