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Chongchao Duan

QC Qingdao Haier Drum Washing Machine Co.: 1 patents #55 of 105Top 55%
📍 Shandong, CN: #981 of 2,138 inventorsTop 50%
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Patent #TitleCo-InventorsDate
11236452 Dual-drum washing machine Wenwei Li, Jinkai Wang, Xiao NING, Xinguo Tian 2022-02-01