Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6615025 | Dual-mode communication system and voice signal processing method of the same | — | 2003-09-02 |
| 6547838 | Sulfuric positive electrode for use in lithium secondary battery and method for manufacturing the same | Jai-Young Lee, Hyo-Jun Ahn, Sang Cheol Han, Young Soo Han, Sung Chul Park | 2003-04-15 |