Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9633642 | Electronic musical instrument system | Atsuo Yukawa, Atsushi Hoshika | 2017-04-25 |
| 9117433 | Tuning device | Shohei Okumura | 2015-08-25 |
| 9064479 | Tuning device | Shohei Okumura | 2015-06-23 |
| 8809661 | Tuning device | Tatsuya Seno, Shohei Okumura | 2014-08-19 |