Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
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Shangfeng Du

Canon: 1 patents #14,899 of 19,416Top 80%
Overall (All Time): #3,305,785 of 4,157,543Top 80%
1 Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
7813554 Method and apparatus of extracting text from document image with complex background, computer program and storage medium thereof Yanquing Wang, Yaping You 2010-10-12