Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5683253 | Disk recording medium and video-song accompaniment apparatus adopting the same | Kwang-Sik Choi | 1997-11-04 |
| 5635657 | Recording medium for video-song accompaniment and video-song accompaniment apparatus adopting the same | Deok-hyun Lee | 1997-06-03 |