Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6825638 | Battery charging system and charging method thereof | — | 2004-11-30 |
| 6806632 | Mask in color cathode ray tube | Sung Yeon Kim | 2004-10-19 |
| 6781298 | Cathode ray tube | Kyung-Jin Zheong, In Hyuk Hwang | 2004-08-24 |