Sunken ship marker and relief buoy
United States Patent 2083306

Inventors:
Bernard, Rooke James
Publication Date:
06/08/1937
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Assignee:
Bernard, Rooke James
Primary Class:
114/327
Other Classes:
340/984, 114/328, 441/27, 441/13, 114/329
International Classes:
B63C7/26; B63C7/00