Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6611492 | Optical recording medium and master disc for preparation thereof | Toshihiro Akimori, Manabu Sato | 2003-08-26 |
| 6597655 | Optical recording medium having wobbling groove extending along the tracks | Manabu Sato, Toshihiro Akimori | 2003-07-22 |
| 6335916 | Optical recording medium, stamper for use to produce the optical recording medium, and method of producing the stamper | Masayoshi Kanno | 2002-01-01 |