SY

Shichang Yu

AT AT&T: 1 patents #10,626 of 18,772Top 60%
📍 Naperville, IL: #1,846 of 3,051 inventorsTop 65%
🗺 Illinois: #48,934 of 84,256 inventorsTop 60%
Overall (All Time): #3,585,079 of 4,157,543Top 90%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
6246757 Telephone calling card system with abbreviated code destination number capability Yigang Cai 2001-06-12