Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10134371 | Stroke adjustment device for keyboard instrument | — | 2018-11-20 |
| 7678977 | Repetition lever of grand piano | Kenji Yoshisue, Tsutomu Kihara | 2010-03-16 |
| 5804745 | Apparatus for adjusting sound volume of grand piano | — | 1998-09-08 |