Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10038963 | Speaker device and audio signal processing method | Masaki Katayama, Susumu Takumai | 2018-07-31 |
| 9674609 | Speaker device and audio signal processing method | Masaki Katayama, Susumu Takumai | 2017-06-06 |