Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4194095 | Fluid flow control speaker system | Toshitada Doi, Akira Iga, Osamu Hamada, Yuichiro Hamada | 1980-03-18 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4194095 | Fluid flow control speaker system | Toshitada Doi, Akira Iga, Osamu Hamada, Yuichiro Hamada | 1980-03-18 |