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B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPINGÂ
B63B22/00—Buoys
B63B22/04—Fixations or other anchoring arrangements
B63B22/08—Fixations or other anchoring arrangements having means to release or urge to the surface a buoy on submergence thereof, e.g. to mark location of a sunken object
B63B22/14—Buoy-to-object securing means responsive to hydrostatic pressure
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FR464756D1913-11-111913-11-11
Buoy self-released by water pressure to indicate the position of sunken boats
ExpiredFR464756A
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