QS

Qing Ren Shen

CO China National Offshore Oil: 1 patents #30 of 142Top 25%
Overall (All Time): #3,207,744 of 4,157,543Top 80%
1
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Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
8181588 Automatic reversing-reposition rocker arm Zhi Fan, Ru Hua Yuan, Hui Xu, Tao Geng, Huai Liang Li +1 more 2012-05-22