Issued Patents 2019
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10433073 | Electroacoustic transducer | Hiroshi Hamada, Yutaka Doshida, Takashi Tomita | 2019-10-01 |
| 10412502 | Electroacoustic transducer with dual vibration plate | Takashi Tomita, Hiroshi Hamada, Yutaka Doshida | 2019-09-10 |