Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6650600 | Digital audio disc recorder | Kazuhisa Machida, Atsushi Ishibashi, Tadahiko Sakamoto, Hideki Ikeda, Atsushi Oonishi | 2003-11-18 |
| 6600700 | Digital audio disc recorder | Kazuhisa Machida, Atsushi Ishibashi, Tadahiko Sakamoto, Hideki Ikeda, Atsushi Oonishi | 2003-07-29 |