Jan Steyn

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Nieuw-Vennep, NL

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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for dredging
- Patent number 4,177,585
- Issue date Dec 11, 1979
- Ballast-Nedam Groep N.V., Amsterdamse Ballast Bagger en Grond (Amsterdam Ball...
- Jan de Koning
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING