QD

Qingfeng Duan

📍 Herndon, VA: #357 of 878 inventorsTop 45%
🗺 Virginia: #12,642 of 34,511 inventorsTop 40%
Overall (All Time): #2,072,847 of 4,157,543Top 50%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
8457447 System for document digitization — 2013-06-04
7936951 System for document digitization — 2011-05-03