Issued Patents 2002
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6451720 | Glass composition, and information recording medium substrate, information recording medium, and information recording device each comprising the composition | Akihiro Koyama, Hiroyuki Tanaka | 2002-09-17 |
| 6399527 | Glass composition and substrate for information recording medium | Akihiro Koyama, Junji Kurachi, Nobuyuki Yamamoto | 2002-06-04 |
| 6376084 | Glass-ceramics, process for producing the same, and substrate for information recording medium, information recording medium and information recording device each using the glass-ceramics | Akihiro Koyama, Hiroyuki Tanaka | 2002-04-23 |
| 6376403 | Glass composition and process for producing the same | Akihiro Koyama, Junji Kurachi, Nobuyuki Yamamoto | 2002-04-23 |
| 6365534 | Glass composition and substrate for information recording media comprising the same | Akihiro Koyama, Junji Kurachi, Nobuyuki Yamamoto | 2002-04-02 |
| 6340647 | Glass composition and substrate for information recording media comprising the same | Akihiro Koyama, Junji Kurachi, Nobuyuki Yamamoto | 2002-01-22 |