Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D925490 | Guitar amplifier headphone | Masato Ueno | 2021-07-20 |
| D924200 | Headphone | Masato Ueno | 2021-07-06 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D925490 | Guitar amplifier headphone | Masato Ueno | 2021-07-20 |
| D924200 | Headphone | Masato Ueno | 2021-07-06 |