Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6068906 | Mold for making disc substrate, process for producing mold and disc substrate | Takeshi Sasa, Toshihiko Takegawa, Takehisa Ishida | 2000-05-30 |
| 6066380 | Disc medium substrate and disc device | Takeshi Sasa, Yasuyuki Imai, Hiroshi Takino, Teiji Kohara, Masayoshi Oshima | 2000-05-23 |
| 5898553 | Magnetic disk and magnetic disk unit | Osamu Morita | 1999-04-27 |