EZ

Enqian Zhan

PL Petrochina Company Limited: 1 patents #264 of 890Top 30%
Overall (All Time): #3,545,830 of 4,157,543Top 90%
1
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Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
6394234 Liquid controlled disk braking device Xiangqian Gao, Heng-Yung Su, Fenrong Cheng 2002-05-28