TREA

Thomas J. Butzen

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  • Greenfield, WI, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Vent damper drive
    • Patent number 4,421,096
    • Issue date Dec 20, 1983
    • Thomas J. Butzen
    • F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
  • Information Patent Grant

    Vent damper drive
    • Patent number 4,262,652
    • Issue date Apr 21, 1981
    • Paragon Resources, Inc.
    • Thomas J. Butzen
    • F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES