Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5085610 | Dual sound toy train set | Robert W. Engel, Joseph W. Franke, Alex R. Piyevsky | 1992-02-04 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5085610 | Dual sound toy train set | Robert W. Engel, Joseph W. Franke, Alex R. Piyevsky | 1992-02-04 |