Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6548139 | Glass substrate for magnetic recording medium, magnetic recording medium, and method of manufacturing the same | Hiroyuki Sakai, Katsutoshi Ono | 2003-04-15 |
| 6383404 | Glass substrate for magnetic recording medium, magnetic recording medium, and method of manufacturing the same | Hiroyuki Sakai, Katsutoshi Ono | 2002-05-07 |