Issued Patents 2004
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6821893 | Method of manufacturing a substrate for information recording media | Junji Kurachi, Kazuishi Mitani | 2004-11-23 |
| 6782717 | Method for manufacturing glass substrate of information recording medium | Kazuishi Mitani, Tatsuro Umeyama, Koji Okuhata, Toshiaki Hashimoto | 2004-08-31 |
| 6780312 | Filtration apparatus | — | 2004-08-24 |
| 6743529 | Process for producing glass substrate for magnetic recording medium and glass substrate for magnetic recording medium obtained by the same | Hiroshi Ikeda, Junji Kurachi, Kazuishi Mitani | 2004-06-01 |
| 6715318 | Glass substrate for information recording media and manufacturing method thereof | Kazuishi Mitani, Tatsuro Umeyama | 2004-04-06 |