TREA

Robert A. Ketelhohn

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  • Charlestown, MA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Humidifier
    • Patent number D432221
    • Issue date Oct 17, 2000
    • Honeywell International Inc.
    • Paul Cox
    • D23 - Environmental heating and cooling
  • Information Patent Grant

    Portable electric heater
    • Patent number D418911
    • Issue date Jan 11, 2000
    • Honeywell Inc.
    • Walter G. Birdsell
    • D23 - Environmental heating and cooling