Gerd Arntjen

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26180 Rastede, DE

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Patents Grantslast 30 patents

Information Patent Grant
Ventilation apparatus
- Patent number 6,273,813
- Issue date Aug 14, 2001
- Gerd Arntjen
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Bearing element for supporting the roof cladding of a light-admitti...
- Patent number 5,782,053
- Issue date Jul 21, 1998
- Gerd Arntjen
- E04 - BUILDING