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Ingenieursbureau voor Systemem en Octrooien "Spanstaal" B.V.
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Amstelveen, NL
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Patents Grants
last 30 patents
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Patent Grant
Suction dredger vessel and method of loading the hold of the same
Patent number
4,172,617
Issue date
Oct 30, 1979
Ingenieursbureau voor Systemem en Octrooien "Spanstaal" B.V.
Jan de Koning
E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING