Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5559297 | Key for keyboard instrument having a perspiration-absorbing surface | Keisuke Watanabe | 1996-09-24 |
| 4656913 | Electronic musical instrument with keyboard and cover | — | 1987-04-14 |