Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8191481 | Friction drive material handling system including composite beam and method of operating same | John M. Spangler | 2012-06-05 |
| 8127687 | Material handling system including dual track assembly and method of operating same | John M. Spangler | 2012-03-06 |