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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19/00
Arrangements or adaptations of ports, doors, windows, port-holes, or other openings or covers
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B63B2019/0053
Locking means for ports, doors, windows, covers, or the like, e.g. providing for watertight closure when locked
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