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Dieter Hofmann
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Augsburg, DE
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last 30 patents
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Patent Grant
High-pressure electric discharge lamp with tight lead-through pin e...
Patent number
5,446,341
Issue date
Aug 29, 1995
Patent-Treuhand-Gesellschaft F. Elektrische Gluehlampen mbH
Dieter Hofmann
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Compact, single-ended fluorescent lamp with fill vapor pressure con...
Patent number
4,694,215
Issue date
Sep 15, 1987
Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH
Dieter Hofmann
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Lamp filament structure, and method of its manufacture
Patent number
4,506,187
Issue date
Mar 19, 1985
Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH
Dieter Hofmann
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Low-pressure mercury vapor discharge lamp, particularly U-shaped fl...
Patent number
4,481,442
Issue date
Nov 6, 1984
Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH
Wolfgang Albrecht
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Electric lamp with an envelope seal designed as pinch seal, and a d...
Patent number
4,469,983
Issue date
Sep 4, 1984
Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH
Helmut Grahmann
H01 - BASIC ELECTRIC ELEMENTS