Issued Patents 2002
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6440531 | Hydrofluoric acid etched substrate for information recording medium | Junji Kurachi, Akihiro Koyama, Yasuhiro Saito, Kazuishi Mitani, Koichi Ataka +1 more | 2002-08-27 |
| 6413892 | Glass substrate for magnetic recording media | Akihiro Koyama | 2002-07-02 |
| 6399527 | Glass composition and substrate for information recording medium | Shoichi Kishimoto, Akihiro Koyama, Junji Kurachi | 2002-06-04 |
| 6376403 | Glass composition and process for producing the same | Akihiro Koyama, Shoichi Kishimoto, Junji Kurachi | 2002-04-23 |
| 6365534 | Glass composition and substrate for information recording media comprising the same | Akihiro Koyama, Shoichi Kishimoto, Junji Kurachi | 2002-04-02 |
| 6340647 | Glass composition and substrate for information recording media comprising the same | Akihiro Koyama, Shoichi Kishimoto, Junji Kurachi | 2002-01-22 |