Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10614727 | Musical instrument practice system, playing practice implementation device, content reproduction system, and content reproduction device | Yasuhiko Asahi, Yuji Takahashi, Kenichi Shiba, Jun Usui, Kenichi Yamauchi | 2020-04-07 |
| 10403166 | Musical performance assistance device and method | Jun Usui | 2019-09-03 |