Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10888253 | Audiometer | Ryoichi Hamanaka | 2021-01-12 |
| 10390126 | Earphone for audiometer, and audiometer | Shinichi ISHIKAWA, Ryoichi Hamanaka | 2019-08-20 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10888253 | Audiometer | Ryoichi Hamanaka | 2021-01-12 |
| 10390126 | Earphone for audiometer, and audiometer | Shinichi ISHIKAWA, Ryoichi Hamanaka | 2019-08-20 |