Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10321216 | Wearable device | — | 2019-06-11 |
| 9516402 | Earpiece and electro-acoustic transducer with protrusions and/or grooved passages | — | 2016-12-06 |
| 8983110 | Headphone device | Keitaro Fujiwara | 2015-03-17 |
| 8767997 | Headphone device | Keitaro Fujiwara | 2014-07-01 |
| 8270648 | Earpiece and electro-acoustic transducer | — | 2012-09-18 |
| 8208676 | Earpiece and earphone | Koji Nageno, Kiminobu Ichimura | 2012-06-26 |
| 7120268 | Headphone | Koji Nageno | 2006-10-10 |
| 6970572 | Headphone device | Koji Nageno | 2005-11-29 |
| 6560346 | Pipe microphone device | Takashi Ohta, Koji Nageno | 2003-05-06 |
| 5949896 | Earphone | Koji Nageno, Naotaka Tsunoda | 1999-09-07 |