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B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPINGÂ
B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
B63B39/12—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude for indicating draught or load
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FR447995D1912-09-051912-09-05
Method for indicating the draft of boats
ExpiredFR447995A
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