Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7224645 | Optical information processing system using optical aberrations and information medium having recording layer protected by transparent layer having thickness irregularity | Hideo Ando, Sumitaka Maruyama | 2007-05-29 |
| 7142484 | Optical information processing system using optical aberrations and information medium having recording layer protected by transparent layer having thickness irregularity | Hideo Ando, Sumitaka Maruyama | 2006-11-28 |
| 6584061 | Optical pick-up device | Katsushige Yanagisawa, Tohru Hotta, Ikuo Kasuga | 2003-06-24 |
| 6522619 | Optical pick-up device having a plurality of light sources with different calorific values and method of manufacturing the same | Katsushige Yanagisawa, Tohru Hotta, Ikuo Kasuga, Toshihiko Okina, Hidenori Sai | 2003-02-18 |
| 5838652 | Data processing optical head apparatus | — | 1998-11-17 |