Guido Krumbach

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Wuppertal, DE

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Patents Grantslast 30 patents

Information Patent Grant
Reinforced-concrete building element
- Patent number 4,977,715
- Issue date Dec 18, 1990
- Hochtief Aktiengesellschaft Vorm. Gebr. Helfmann
- Guido Krumbach
- E04 - BUILDING