Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5669366 | Closed crankcase ventilation system | Peter K. Herman, Alan S. Bounnakhom, David M. Ruch, John M. Partridge, J. Eric Parlow | 1997-09-23 |
| 5556542 | Fluid filter assembly | Claude L. Berman | 1996-09-17 |
| 5549821 | Fluid filter assembly for vehicles | Alan S. Bounnakhom, Claude L. Berman | 1996-08-27 |
| 5171430 | Plastic filter | Udo E. Holzhausen, Lawrence B. Feldhaus, Charles L. Matheson, Monroe L. Newton, Steve F. Robbins +1 more | 1992-12-15 |