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Zhang Zhijun

SC Shenzhen Grandsun Electronic Co.: 1 patents #42 of 75Top 60%
Overall (All Time): #4,157,494 of 4,157,543Top 100%
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Patent #TitleCo-InventorsDate
D871367 Headphone Wu Haiquan, Tang Zhonghui, Peng Jiugao, Shi Ruiwen 2019-12-31