Google Patents Dredging apparatus having a diver-operated hand-held dredge head for quasi-closed loop systemĭownload PDF Info Publication number US4854058A US4854058A US07/208,474 US20847488A US4854058A US 4854058 A US4854058 A US 4854058A US 20847488 A US20847488 A US 20847488A US 4854058 A US4854058 A US 4854058A Authority US United States Prior art keywords water nozzle dredge head solids Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US4854058A - Dredging apparatus having a diver-operated hand-held dredge head for quasi-closed loop system US4854058A - Dredging apparatus having a diver-operated hand-held dredge head for quasi-closed loop system
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