Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5663513 | Keyboard musical instrument performable without noise in silent mode | Nobuo Sugiyama | 1997-09-02 |
| 5652403 | Keyboard musical instrument allowing player to perform ensemble together with electronic sound system | Nobuo Sugiyama | 1997-07-29 |
| 5650580 | Automatic playing system for acoustic musical instrument | Jun Yamamoto | 1997-07-22 |