Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4203345 | Automatic visual teaching device for the learning of music or component parts thereof | Maurice Collin, Andre Collin | 1980-05-20 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4203345 | Automatic visual teaching device for the learning of music or component parts thereof | Maurice Collin, Andre Collin | 1980-05-20 |