YC

Y. W. Chang

US Umax Data Systems: 1 patents #55 of 119Top 50%
Overall (All Time): #2,220,086 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
6481860 Circular optical reflection apparatus 2002-11-19
D378036 Mat 1997-02-18