TREA

Klaas W. Roelfsema

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  • Gasselternijveenschemond, NL
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Patents Grantslast 30 patents

  • Information Patent Grant

    Gas-fired heating apparatus
    • Patent number 7,252,052
    • Issue date Aug 7, 2007
    • Ceramat, S.Coop.
    • Alexander Groehl
    • F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
  • Information Patent Grant

    Gas-fired water heater
    • Patent number 6,945,196
    • Issue date Sep 20, 2005
    • Schott Spezialglas AG
    • Stefan Hubert
    • F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
  • Information Patent Grant

    Gas burner with pollution-reducing features
    • Patent number 6,129,545
    • Issue date Oct 10, 2000
    • Schott Glaswerke
    • Michael Kahlke
    • F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES

Patents Applicationslast 30 patents