Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10358248 | Method of converting an existing flexible intermediate bulk container or bulk bag unloader to a continuous feed bulk cargo receiver | Mark K. Donohoo, Michael L. Walker, Steven W. Spahn, Jeffrey H. West | 2019-07-23 |
| 10160152 | Long fiber extrusion apparatus and method | Mark K. Donohoo, Michael L. Walker, Jeffery H. West, Steven W. Spahn | 2018-12-25 |
| 9834390 | Bulk cargo blending hopper | Mark K. Donohoo, Michael L. Walker, Steven W. Spahn, Jeffery H. West | 2017-12-05 |
| 8894398 | Modular plastics extrusion apparatus | Mark K. Donohoo, Terry B. McGregor, Michael L. Walker, Steven W. Spahn, Jeffery H. West | 2014-11-25 |