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Marker buoy apparatus
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Patent number 5,234,365
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Issue date Aug 10, 1993
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Lowell T. Cooper
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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Deep ocean recoverable acoustic sensor vehicle
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Patent number 5,003,514
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Issue date Mar 26, 1991
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The United States of America as represented by the Secretary of the Navy
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Edward J. Cotilla
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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3732588
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Patent number 3,732,588
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Issue date May 15, 1973
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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2971206
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Patent number 2,971,206
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Issue date Feb 14, 1961
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT