Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7689425 | Quality of service call routing system using counselor and speech recognition engine and method thereof | Do-Sung Kim, Kwan-Sik Yoo, Seung Woo Chung, Jeong Hun Lee | 2010-03-30 |
| 6790344 | Liquid-phase adsorption process for removing and concentrating heteroatom compounds in hydrocarbons | Wha-Sik Min, Sin-Young Khang, Jae Wook Ryu, Kwan-Sik Yoo, Jyu-Hwan Kim | 2004-09-14 |
| 6248230 | Method for manufacturing cleaner fuels | Wha-Sik Min, Kyung Il Choi, Sin-Young Khang, Jae Wook Ryu, Kwan-Sik Yoo +1 more | 2001-06-19 |