Issued Patents 2017
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9820047 | Signal processing method and speaker system | Akihisa Kawamura, Toshiyuki Matsumura, Isao Kakuhari, Satoshi Takayama, Kazuki Honda +1 more | 2017-11-14 |
| 9774935 | Speaker device | Toshiyuki Matsumura, Akihisa Kawamura, Kazuki Honda, Takafumi Yuasa, Satoshi Takayama | 2017-09-26 |
| 9668058 | Speaker diaphragm, speaker, device, and method for manufacturing speaker diaphragm | Toshiyuki Matsumura | 2017-05-30 |