Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6957444 | Optical disk and method of producing the same | Takeo Kojima | 2005-10-18 |
| 6819650 | Optical disc having land pre-pits and variable groove depths | Takayuki Deno, Kenichi Shimomai, Tsutomu Matsumoto, Fumitaka Tsuji | 2004-11-16 |
| 6733957 | Disk substrate and manufacturing method therefor, and disk manufactured by the disk substrate | Kenichi Shimomai | 2004-05-11 |