Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9918157 | Headphone type acoustic apparatus and control method therefor | Jo Kamada, Asako Kawamura, Yasuhiro Onogi | 2018-03-13 |
| 9693129 | Headphone type acoustic apparatus | Jo Kamada, Asako Kawamura, Yasuhiro Onogi | 2017-06-27 |
| 6334788 | Electronic apparatus for reproducing data | Hirotaka Sakaguchi, Tatsuo Yoshida, Hitoshi Tamai | 2002-01-01 |