ZD

Zhao Dai

📍 Shizhe, CN: #50 of 109 inventorsTop 50%
Overall (All Time): #3,528,600 of 4,157,543Top 85%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
6648539 Free ink writing instrument with nano technology — 2003-11-18