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Mervin D. Swanson

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  • Puyallup, WA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Penetration seal
    • Patent number 4,498,692
    • Issue date Feb 12, 1985
    • Mervin D. Swanson
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Chimney heat economizer
    • Patent number 4,280,656
    • Issue date Jul 28, 1981
    • Mervin D. Swanson
    • F24 - HEATING RANGES VENTILATING