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Large capacity boat lift
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Patent number 6,709,197
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Issue date Mar 23, 2004
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Quality Boat Lifts, Inc.
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Charles L. Sargent
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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Boat lift cable lock apparatus
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Patent number 5,988,941
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Issue date Nov 23, 1999
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Quality Boat Lifts, Inc.
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Charles L. Sargent
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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Positive drive boat lift
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Patent number 5,915,877
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Issue date Jun 29, 1999
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Quality Boat Lift, Inc.
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Charles L. Sargent
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B66 - HOISTING LIFTING HAULING
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Adjustable clamping assembly
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Patent number 5,833,417
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Issue date Nov 10, 1998
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Quality Boat Lifts, Inc.
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Charles L. Sargent
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...