Rene-Hagen Voelki

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Maria Enzersdorf, AT

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Patents Grantslast 30 patents

Information Patent Grant
Building elements and their preparation
- Patent number RE31421
- Issue date Oct 18, 1983
- Isovolta Osterreichische Isolierstoffwerke Aktiengesellschaft
- Felix Wehrmann
- 521 - Synthetic resins or natural rubbers