Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6757240 | Disc protection casing and drive for receiving the same | Won Hyoung Cho | 2004-06-29 |
| 6676477 | Toy having detachable central processing unit | Byung-Ju Dan, Jae Na, Jang Boo, Hee Wang, Nam-Woong Kim +1 more | 2004-01-13 |