Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7925017 | Information recording device, information playback device, information recording medium, information recording method, information playback method, and program providing medium | Taizo Shirai, Yoshihito Ishibashi, Kenji Yoshino, Toru Akishita, Takeshi Ito | 2011-04-12 |
| 6834333 | Data processing device, data storage device, data processing method, and program providing medium for storing content protected under high security management | Kenji Yoshino, Yoshihito Ishibashi, Toru Akishita, Taizo Shirai, Takeshi Ito | 2004-12-21 |
| 6823420 | Entertainment apparatus | Hideaki Io, Yasuyuki Yamamoto, Yuichi Inomata, Shinichi Fukushima | 2004-11-23 |
| 4459540 | Constant voltage generating circuit | — | 1984-07-10 |