Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11240603 | Speaker apparatus, audio data supply apparatus, and audio data reproduction system | — | 2022-02-01 |
| 5789975 | Analog signal amplifier and audio signal amplifier | Yoshimichi Maejima | 1998-08-04 |