Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6804189 | Near field optical recording medium | Koyata Takahashi, Koji Katayama, Tatsuo Kawasaki, Kenichi Sekimoto, Toru Futami +1 more | 2004-10-12 |
| 6802073 | Magneto-optical recording medium | Koyata Takahashi, Keiichiro Nishizawa | 2004-10-05 |