Patents & Certificates
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Bathtub Combined Bed (2011.06.01)
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Windsurfing Board (2010.07.29)
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A Tent Frame Made of Air Tube and a Tent Using the Same (2010.07.29)
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Lifebelt for Distress Rescue (2010.01.19)
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Rescue Buoy (2009.07.21)
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Trailer with Lighting (2009.01.09)
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