Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5616880 | Keyboard musical instrument equipped with hammer shank stopper where hammer assembly rebounds without deflection of shank | Hajime Hayashida, Takashi Aoyagi, Satoshi Inoue, Kiyoshi Kawamura, Shigeaki Sato | 1997-04-01 |