Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D718809 | Digital piano | Takenori Omachi, Sunao Okamura | 2014-12-02 |
| D718375 | Digital piano | Sunao Okamura, Takenori Omachi | 2014-11-25 |
| D696715 | Electronic keyboard | Kazuki Kashiwase | 2013-12-31 |
| D668710 | Electronic keyboard | Sunao Okamura | 2012-10-09 |