Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6796401 | Speaker apparatus equipped with means for producing complicated waveform of low frequency with higher improved fidelity | Hiroyuki Yoshii | 2004-09-28 |
| 6484843 | Speaker apparatus equipped with means for producing complicated waveform of low frequency with higher improved fidelity | Hiroyuki Yoshii | 2002-11-26 |