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USPTO Patent Rankings Data through Sept 30, 2025
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Chao Song — 5 Patents in 2021

Qualcomm: 4 patents #285 of 1,914Top 15%
Amazon: 1 patents #1,401 of 4,535Top 35%
Xuancheng, CA: #1 of 3 inventorsTop 35%
Overall (2021): #34,535 of 548,734Top 7%
5 Patents 2021

Issued Patents 2021

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDate
11177819 Power and area efficient digital-to-time converter with improved stability Zhengzheng Wu, Karthik Nagarajan 2021-11-16
11100125 Migrating data between partitioned databases Stephen C. Trier, Xuan Wu, Guoqiang Duan, Aaron Joseph Coon, Brian Lee Blackmore +1 more 2021-08-24
11004784 Metal-on-metal capacitor Haitao Cheng, Ye Lu 2021-05-11
10972068 Process-invariant delay cell Haitao Cheng, Ye Lu, Dongjiang Qiao 2021-04-06
10896949 Inductor/transformer with closed ring Haitao Cheng, Ye Lu 2021-01-19