Issued Patents 2017
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9601028 | Musical instrument training device and method | Jeffrey C. Petrin, Mariusz Smialek | 2017-03-21 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9601028 | Musical instrument training device and method | Jeffrey C. Petrin, Mariusz Smialek | 2017-03-21 |