Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7344577 | Filter frame for bag house filter, and method | — | 2008-03-18 |
| 6090173 | Air filter assembly for filtering air with particulate matter | Steven A. Johnson, Thomas D. Raether | 2000-07-18 |
| 5954849 | Filter element | Michael S. Bergeson, Dolan Bartels | 1999-09-21 |
| 5803941 | Filter element | Dolan Bartels, Michael S. Bergeson, Bruce Johnson, Steven D. Schmeichel | 1998-09-08 |
| 4792344 | Air filtering method and apparatus | Mark Belcher, Bruce A. Hampel | 1988-12-20 |
| 4209310 | Filter element mounting mechanism | — | 1980-06-24 |
| 4199334 | Self-cleaning air filter | — | 1980-04-22 |