Norbert Seemann

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Nienhagen, DE

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Patents Grantslast 30 patents

Information Patent Grant
Constructional element with acoustic properties
- Patent number 4,782,913
- Issue date Nov 8, 1988
- Dr. Alois Stankiewicz GmbH
- Manfred Hoffmann
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Sound insulation part for surfaces
- Patent number 4,705,139
- Issue date Nov 10, 1987
- Dr. Alois Stankiewicz GmbH
- Heinemann Gahlau
- G10 - MUSICAL INSTRUMENTS ACOUSTICS