Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7474753 | Sound field control apparatus, signal processing apparatus, sound field control program, and signal processing program | Akio Suyama, Keiji Kawakami | 2009-01-06 |
| 5570424 | Sound effector capable of imparting plural sound effects like distortion and other effects | Akio Suyama | 1996-10-29 |