Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7678981 | Keyboard structure of electronic keyboard instrument | — | 2010-03-16 |
| 7544876 | Keyboard apparatus of electronic keyboard instrument | — | 2009-06-09 |
| 7476795 | Keyboard device for electronic musical keyboard instrument | — | 2009-01-13 |
| 6980432 | Electronic apparatus | Yoshihiro Natsume, Takashi Kato, Naohide Kohyama | 2005-12-27 |