Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6644589 | Compressed air engine and flying object equipped therewith | Ja Kook Koo, Kwang-Joon Yoon, Yun Je Kim | 2003-11-11 |
| 6540177 | Flying object by flapping motion of wings equipped with compressed air engine | Ja Kook Koo, Kwang-Joon Yoon, Yun Je Kim | 2003-04-01 |
| 6530541 | Compressed air engine and flying object equipped therewith | Ja Kook Koo, Kwang-Joon Yoon, Yun Je Kim | 2003-03-11 |