Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6978612 | Utility device having hydraulic circuit for multi-function valve | David R. Smith | 2005-12-27 |
| 6865827 | Utility device having an improved rotatable drive mechanism | David R. Smith | 2005-03-15 |
| 6209880 | Auger hopper seal | Dennis J. Turnwald, David R. Smith, Michael J. Hilvers | 2001-04-03 |