TREA

Rolf M. Hanson

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  • Holmen, WI, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Fresh air flor modulation device
    • Patent number 5,741,180
    • Issue date Apr 21, 1998
    • American Standard Inc.
    • Lunxi Peter Xia
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Grant

    Fresh air flow modulation device
    • Patent number 5,674,125
    • Issue date Oct 7, 1997
    • American Standard Inc.
    • Lunxi Peter Xia
    • F24 - HEATING RANGES VENTILATING