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Hongxin Yan

XC Xuzhou Coal Mine Safety Equipment Manufacture Co.: 1 patents #15 of 41Top 40%
Overall (All Time): #2,766,053 of 4,157,543Top 70%
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Patent #TitleCo-InventorsDate
11199091 Cageway connecting device and connecting method thereof Qiang Qin, Changhua Hu, Qingyong Du, Jianguo Ding 2021-12-14