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Xin Yuanfa

SC Shenzhen Grandsun Electronic Co.: 1 patents #42 of 75Top 60%
Overall (All Time): #2,776,369 of 4,157,543Top 70%
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Patent #TitleCo-InventorsDate
D875709 Earphone Wu Haiquan, Yu Xin, Shi Ruiwen 2020-02-18