CR

Chang Wan Ryoo

📍 Seoul, KR: #18,030 of 39,741 inventorsTop 50%
Overall (All Time): #2,100,632 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
7864933 System and method for managing prepaid card — 2011-01-04
6793135 Electronic payment system using multifunctional prepaid cards and method of selling prepaid cards — 2004-09-21