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Hebei Tianshun Children's Toys Co., Ltd. v. Liang Chafei resqusting Patent Reexamination Board to declare "A Child Swing Car(Crazy Racer) "design pate
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Hebei Tianshun Children's Toys Co., Ltd. v. Liang Chafei resqusting Patent Reexamination Board to declare "A Child Swing Car(Crazy Racer) "design patent invalid
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