Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12067098 | Personal authentication device, personal authentication method, and recording medium | Takafumi Koshinaka, Kouji OOSUGI | 2024-08-20 |
| 11586716 | Personal authentication device, personal authentication method, and recording medium | Takafumi Koshinaka, Kouji OOSUGI | 2023-02-21 |
| 11039236 | Ear pad and earphone using the same | Kouji OOSUGI, Takafumi Koshinaka | 2021-06-15 |