Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6426155 | Magnetic hard disc substrate and process for manufacturing the same | Kiyoshi Tada, Kenji Tomita, Tomoya Utashiro | 2002-07-30 |
| 6378338 | Method for producing magnetic disk substrates | Kazuyoshi Nishizawa, Kiyoshi Tada | 2002-04-30 |