TREA

Gerhard Doell

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  • Ulm, DE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Longitudinal light source
    • Patent number 6,494,605
    • Issue date Dec 17, 2002
    • Patent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbH
    • Gerhard Doell
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Method for operating a discharge lamp
    • Patent number 6,259,214
    • Issue date Jul 10, 2001
    • Patent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbH
    • Gerhard Doell
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Dimmable lighting apparatus
    • Patent number 6,238,054
    • Issue date May 29, 2001
    • Patent-Treuhand-Gesellschaft fuer elektrishe Gluehlampen mbH
    • Gerhard Doell
    • G02 - OPTICS