Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9623881 | Valve interlock systems for use with railcars | Ben Miller, Justin Dobsch, Roger Dalske | 2017-04-18 |
| 5507235 | Gravity outlet | Richard H. Dugge | 1996-04-16 |
| 5448955 | Gravity outlet latching mechanism | Richard H. Dugge | 1995-09-12 |