Hans D. H. Roggeveen

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Nieuw Lekkerland, NL

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Patents Grantslast 30 patents

Information Patent Grant
Hopper barge with bottom flaps and a suction channel
- Patent number 4,548,147
- Issue date Oct 22, 1985
- IHC Holland N.V.
- Hans D. H. Roggeveen
- B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT