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USPTO Patent Rankings Data through Sept 30, 2025
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Liqing Du — 1 Patent in 2021

Overall (2021): #361,609 of 548,734Top 70%
1 Patents 2021

Issued Patents 2021

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
11097709 Brake cylinder, brake clamp unit and rail vehicle Hongwen Han, Chunguang Bao, Junhua Zhu, Qingbing GOU, Zhuomin Mei 2021-08-24