Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Qing Chang — 1 Patent in 2021

Overall (2021): #298,072 of 548,734Top 55%
1 Patents 2021

Issued Patents 2021

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
11189117 Method and system for controlling a smart lock Hongwei Qiao, Jing Zhang 2021-11-30