Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6673991 | Keyboard lid opening and closing mechanism for keyboard musical instrument and keyboard musical instrument | — | 2004-01-06 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6673991 | Keyboard lid opening and closing mechanism for keyboard musical instrument and keyboard musical instrument | — | 2004-01-06 |