Sjerp Zeldenrust

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Winsum, NL

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Patents Grantslast 30 patents

Information Patent Grant
Method for extracting and grading sand
- Patent number 6,499,239
- Issue date Dec 31, 2002
- De Groot Nijkerk Machinefabriek BV
- Hendrikus Van Berk
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING