Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6660917 | Keyboard musical instrument having fall board formed with clearance for fingers | Kiyoshi Kawamura | 2003-12-09 |
| 4987601 | Acoustic apparatus | — | 1991-01-22 |
| 4336502 | Amplifier with input stage differential amplifying circuit | — | 1982-06-22 |