Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7884667 | Pulse area modulation and high-efficiency linear power amplifier system using the same | Sang Wook Nam | 2011-02-08 |
| 7134379 | Gas cylinder | Dong Ma, Ki-Cheol Lee | 2006-11-14 |
| 7134634 | Column unit | In Sun JANG | 2006-11-14 |
| 6840484 | Gas cylinder | — | 2005-01-11 |