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Headlamp bulb
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Patent number 6,981,793
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Issue date Jan 3, 2006
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Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH
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Gerhard Behr
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F21 - LIGHTING
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Method for producing an electric lamp
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Patent number 6,736,920
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Issue date May 18, 2004
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Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH
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Uwe Kantim
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H01 - BASIC ELECTRIC ELEMENTS
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Discharge lamp
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Patent number 6,642,640
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Issue date Nov 4, 2003
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Patent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbH
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Peter Helbig
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H01 - BASIC ELECTRIC ELEMENTS
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Electric lamp
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Patent number 6,244,737
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Issue date Jun 12, 2001
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Patent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbH
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Roland Rittner
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H01 - BASIC ELECTRIC ELEMENTS