Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7092537 | Digital self-adapting graphic equalizer and method | Rustin W. Allred, Hirohisa Yamaguchi | 2006-08-15 |
| 6697492 | Digital signal processing acoustic speaker system | Hirohisa Yamaguchi | 2004-02-24 |