Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4444083 | Keyboard instrument, especially a piano or similar instrument | Marlene Apel | 1984-04-24 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4444083 | Keyboard instrument, especially a piano or similar instrument | Marlene Apel | 1984-04-24 |