Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B63
SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
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B63B
SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
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5/00
Hulls characterised by their construction of non-metallic material
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B63B5/14
made predominantly of concrete, e.g. reinforced
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B63B5/20
in combination with elements of other materials
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