Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6835315 | Media vacuum filter | Keith K. Nelson | 2004-12-28 |
| 6817747 | Portable variable speed volumetric feed hopper | Mark Preisser | 2004-11-16 |
| 6802964 | Tipping pit water reclaiming system | Mark Preisser | 2004-10-12 |