DD

Dan Duan

AC Asia Optical Co.: 1 patents #175 of 366Top 50%
SI Sinopec Engineering Incorporation: 1 patents #14 of 43Top 35%
📍 Shangchuan, CN: #7 of 44 inventorsTop 20%
Overall (All Time): #1,755,550 of 4,157,543Top 45%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
11946002 Method and device for treating oil gas Mengqi Huang, Longhong Yu, Lei Wu, Shengyang Jiang, Yuwen Ding +2 more 2024-04-02
7046345 Apparatus for precise distance measurement Pie-Yau Chien, Dong Huang, Kuo-Hua Yang 2006-05-16