Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6944309 | Headphone system | Kenichi Terai, Hiroyuki Hashimoto, Isao Kakuhari | 2005-09-13 |
| 4939601 | Playback apparatus having a single mode selecting pushbutton | Hirotaka Endo, Atsushi Nagayoshi | 1990-07-03 |