Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Fee Related Application number US06/578,577 Inventor Jim Bleke Original Assignee Jim Bleke Priority date (The priority date is an assumption and is not a legal conclusion. Google Patents Draft reduction system for shipsÄownload PDF Info Publication number US4622912A US4622912A US06/578,577 US57857784A US4622912A US 4622912 A US4622912 A US 4622912A US 57857784 A US57857784 A US 57857784A US 4622912 A US4622912 A US 4622912A Authority US United States Prior art keywords hull vessel draft vessels semi Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US4622912A - Draft reduction system for ships US4622912A - Draft reduction system for ships
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