Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6728076 | Cartridge having sensor hole to be opened/closed and apparatus and method for driving the same | Jung-wan Ko, Dong-Ho Shin, In-sik Park, Young-sun Seo, Han-kook Choi +2 more | 2004-04-27 |
| 6574189 | Cartridge having sensor hole to be opened/closed and apparatus and method for driving the same | Jung-wan Ko, Dong-Ho Shin, In-sik Park, Young-sun Seo, Han-kook Choi +2 more | 2003-06-03 |