Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7678977 | Repetition lever of grand piano | Hirotaka Higasa, Tsutomu Kihara | 2010-03-16 |
| 7476788 | Damper lever for upright piano | — | 2009-01-13 |
| 7459616 | Shank flange for piano | — | 2008-12-02 |
| 7335829 | Bat for upright piano | Kiyoshi Abe | 2008-02-26 |
| 7169990 | Back check for piano | — | 2007-01-30 |
| 7141728 | Action part for piano | Kiyoshi Abe | 2006-11-28 |
| 6740801 | Action for keyboard-based musical instrument | Yozo Koyama | 2004-05-25 |