Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7517911 | 3,4,5-trimethoxy phenyl-based ester compound and preparation method thereof and whitening cosmetic composition containing the same | Ho Sik Rho, Jae Sung Hwang, Hyun Jung Choi, Hyun Jung Shin, Eun-Young Lee +2 more | 2009-04-14 |
| 7282522 | Hydroxamic acid derivatives and the method for preparing thereof | Ho Sik Rho, Heung Soo Baek, Su-Jong Kim, Su Nam Kim, Byung Geun Chae +9 more | 2007-10-16 |
| 6916844 | Hydroxy pyranone derivative and preparation method thereof | Ho Sik Roh, Su Nam Kim, Hae Kwang Lee, Duck Hee Kim, Ih Seop Chang +1 more | 2005-07-12 |