Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6423430 | Magneto-optical recording medium for short wavelength | Yong-jin Ahn | 2002-07-23 |
| 5976617 | Initialization method of phase transformation-type optical disk | Byung-Il Cho, Seung-tae Jung | 1999-11-02 |
| 5718961 | Phase change type optical disk | — | 1998-02-17 |