Issued Patents 2005
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6977232 | Optical glass, preform for press molding and optical part | Kazutaka Hayashi | 2005-12-20 |
| 6960399 | Crystalized glass for information recording medium, crystallized glass substrate, and information recording medium using the crystallized glass substrate | Kouji Azegami | 2005-11-01 |
| 6905988 | Substrate for information recording medium and magnetic recording medium composed of crystallized glass | — | 2005-06-14 |