Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6780215 | Vacuum pump aspirator for work vehicle pre-cleaner | Eric A. Keen, Dennis A. Bowman | 2004-08-24 |
| 6588524 | Vacuum pump aspirator for work vehicle pre-cleaner | Eric A. Keen, Dennis A. Bowman | 2003-07-08 |