Helmut D. Siegmund

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Bad Honnef, DE

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Patents Grantslast 30 patents

Information Patent Grant
Spacer plate for a hollow floor and a hollow floor made therewith
- Patent number 6,539,681
- Issue date Apr 1, 2003
- Helmut Siegmund
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Surface element for a heatable floor with hollow spaces
- Patent number 5,042,569
- Issue date Aug 27, 1991
- Siegmund GmbH
- Helmut D. Siegmund
- F24 - HEATING RANGES VENTILATING