Issued Patents 2011
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D650828 | Bow hold training device for violin and viola | — | 2011-12-20 |
| D650829 | Bow hold training device for pinky finger for violin and viola | — | 2011-12-20 |
| D650830 | Cello bow hold training device | Martha Brons | 2011-12-20 |