Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5641925 | High resolution key sensor incorporated in keyboard musical instrument | — | 1997-06-24 |
| 5610356 | Keyboard musical instrument having hammer stopper exactly position at blocking position | Kiyoshi Kawamura | 1997-03-11 |
| 5594188 | Keyboard musical instrument having key action mechanisms movable to and from strings | Kiyoshi Kawamura, Taroh Muramatsu, Masahiro Wada, Nobuo Sugiyama | 1997-01-14 |
| 5591927 | Keyboard musical instrument having key action mechanisms movable to and from strings | Kiyoshi Kawamura, Taroh Muramatsu, Masahiro Wada, Nobuo Sugiyama | 1997-01-07 |