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John W. Seppamaki

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  • Grandville, MI, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Fresh air make-up apparatus
    • Patent number 4,735,130
    • Issue date Apr 5, 1988
    • John W. Seppamaki
    • F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
  • Information Patent Grant

    Flue control device
    • Patent number 4,499,891
    • Issue date Feb 19, 1985
    • John W. Seppamaki
    • F24 - HEATING RANGES VENTILATING