Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4803731 | Reverbation imparting device | Koji Niimi, Yuji Kakubo | 1989-02-07 |
| 4706291 | Reverberation imparting device | Yuji Kakubo, Koji Niimi | 1987-11-10 |
YI
Yuji Ikegaya
Nippon Gakki Seizo: 1 patents #163 of 332Top 50%
Overall (All Time): #140,443 of 4,157,543Top 4%
27
Patents All Time