Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8983110 | Headphone device | Katsunori Murozaki | 2015-03-17 |
| 8767997 | Headphone device | Katsunori Murozaki | 2014-07-01 |
| 8213665 | Headphone | Naotaka Tsunoda, Yuusuke Oosato | 2012-07-03 |
| 7853035 | Headphones and headphones placement device | Naotaka Tsunoda | 2010-12-14 |