DC

David Chao

CO Contour Optik: 2 patents #1 of 2Top 50%
📍 Saratoga, CA: #93 of 341 inventorsTop 30%
🗺 California: #4,287 of 28,521 inventorsTop 20%
Overall (2003): #71,609 of 273,478Top 30%
2
Patents 2003

Issued Patents 2003

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
6632000 Pen for receiving eyeglasses — 2003-10-14
6530660 Eyeglass frame with a reversible arm Chi-Pei Cheng 2003-03-11