Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6178153 | Compact disk auto-exchanger and method thereof | Chan-Kyoung Cho, Young Beom Choi | 2001-01-23 |
| 5613745 | Auxiliary compact disk storage case | Chan-Kyoung Cho | 1997-03-25 |