Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8541672 | Pedal apparatus of electronic musical instrument | Toshiyuki Iwamoto, Mitsuru Kitajima, Shigeru Muramatsu | 2013-09-24 |
| 7956261 | Pedal apparatus of electronic musical instrument | Toshiyuki Iwamoto, Mitsuru Kitajima, Shigeru Muramatsu | 2011-06-07 |