Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE35161 | Keyboard device of electronic musical instrument | Shinji Kumano | 1996-02-27 |
| 5090290 | Keyboard device of electronic musical instrument | Shinji Kumano | 1992-02-25 |
| 4846041 | Keyboard device of electronic musical instrument | Shinji Kumano | 1989-07-11 |
| 4604937 | Keyboard device of electronic musical instrument | Shinji Kumano | 1986-08-12 |