Gerrit H. van Zeggelaar

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Utrecht, NL

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Patents Grantslast 30 patents

Information Patent Grant
Suction dredger and method of loading the same
- Patent number 4,245,932
- Issue date Jan 20, 1981
- Ingenieursbureau voor Systemen en Octrooien "Spanstaal" B. V.
- Gerrit H. van Zeggelaar
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Suction dredger
- Patent number 4,175,342
- Issue date Nov 27, 1979
- Goyo Ballast Company Ltd.
- Jan de Koning
- B66 - HOISTING LIFTING HAULING