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Prone position watercraft
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Patent number 8,696,395
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Issue date Apr 15, 2014
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William Adam Masters
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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Boiler wash
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Patent number 6,092,491
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Issue date Jul 25, 2000
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William Masters
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F24 - HEATING RANGES VENTILATING
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Boat handling slots
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Patent number D400155
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Issue date Oct 27, 1998
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Mainstream Products, Inc.
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William E. Masters
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D12 - Transportation
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Truss anchor
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Patent number 5,732,524
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Issue date Mar 31, 1998
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Building Technologies, Inc.
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William J. Kalker
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E04 - BUILDING
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Kayak
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Patent number D391916
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Issue date Mar 10, 1998
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Mainstream Products, Inc.
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William E. Masters
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D12 - Transportation
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Kayak catamaran
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Patent number 5,189,974
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Issue date Mar 2, 1993
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William E. Masters
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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Canoe with asymmetrical hull
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Patent number 5,172,646
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Issue date Dec 22, 1992
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William E. Masters
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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Rotational molding apparatus
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Patent number 5,039,297
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Issue date Aug 13, 1991
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William E. Masters
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Method for rotational molding
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Patent number 4,980,112
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Issue date Dec 25, 1990
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William E. Masters
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Foot brace for kayaks
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Patent number 4,942,840
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Issue date Jul 24, 1990
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William E. Masters
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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Adjustable kayak paddle
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Patent number 4,820,216
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Issue date Apr 11, 1989
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William E. Masters
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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Kayak foot brace
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Patent number 4,744,327
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Issue date May 17, 1988
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William E. Masters
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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Detachable pod and kayak
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Patent number 4,727,821
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Issue date Mar 1, 1988
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William E. Masters
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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Variable volume kayak hull
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Patent number 4,715,311
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Issue date Dec 29, 1987
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William E. Masters
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT