Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10887702 | Loudspeaker | Minoru Ueno, Takao Ishikawa | 2021-01-05 |
| 10328831 | Acoustic device | Naoki Takada, Takao Ishikawa, Takahiko NAGASAWA, Yasuyuki Ito | 2019-06-25 |
| 10237648 | Sound collecting device, and method of controlling sound collecting device | Naoki Takada | 2019-03-19 |
| 10064496 | Head rest device | Naoki Takada, Takao Ishikawa, Takahiko NAGASAWA, Yasuyuki Ito | 2018-09-04 |
| 9981613 | Headrest and vehicle seat with integrated speakers | Yasuyuki Ito, Takahiko NAGASAWA, Naoki Takada, Takao Ishikawa | 2018-05-29 |
| 9975459 | Headrest device and sound collecting device | Naoki Takada, Takao Ishikawa, Takahiko NAGASAWA, Yasuyuki Ito, Junpei Yoshikawa | 2018-05-22 |