Ronaldus Wilhelmus Maria Gerardus Heijmans

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Utrecht, NL

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Patents Grantslast 30 patents

Information Patent Grant
Lining element for a drilled tunnel
- Patent number 6,368,020
- Issue date Apr 9, 2002
- Arcadis Bouw/Infra B.V.
- Ronaldus Wilhelmus Maria Gerardus Heijmans
- E21 - EARTH DRILLING MINING