Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6251294 | Ultrasonic filter regenerating apparatus and method | Dan Michael Hausermann | 2001-06-26 |
| 5989421 | Bag filter rim system | John D. Vander Ark, Jr. | 1999-11-23 |
| 5785870 | Variable flow filter unit | Kenneth Thomas Bennick, Michael E. Isch | 1998-07-28 |
| 5527462 | Filter with axially movable wiper | John D. Vander Ark, Jr. | 1996-06-18 |
| 5198111 | Filter with reciprocating cleaner unit | — | 1993-03-30 |
| 5087365 | Filter with rotating wiper having indexing blades | Danny K. Kaiser | 1992-02-11 |
| 5084176 | Vibrating filter | Kenneth P. Grantham, John W. Rishel | 1992-01-28 |