Proehl Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Fee Related Application number US06/505,883 Inventor Norman P. Google Patents Dredge swinging apparatusĭownload PDF Info Publication number US4470209A US4470209A US06/505,883 US50588383A US4470209A US 4470209 A US4470209 A US 4470209A US 50588383 A US50588383 A US 50588383A US 4470209 A US4470209 A US 4470209A Authority US United States Prior art keywords barge spud dredge pivot sleeve dredging Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US4470209A - Dredge swinging apparatus
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