Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7983438 | Headphone device | — | 2011-07-19 |
| 7873177 | Headphone apparatus and headphone system | Toru Okamura, Naoki Watanabe | 2011-01-18 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7983438 | Headphone device | — | 2011-07-19 |
| 7873177 | Headphone apparatus and headphone system | Toru Okamura, Naoki Watanabe | 2011-01-18 |