- American Air Control
- American Air Control
- American Filter & Steam Svc
- B C & Sons
- Commercial Filter Svc
- Commercial Filter Svc Inc
- D & D Filter Recycling
- Dusty's Filter Svc
- Environmental Infection Cntrl
- Filter Science Inc
- FSI Of Arkansas
- Great Valley Industries
- Interstate Filter Svc
- Keller USA Inc
- Kleen Air Research Inc
- Norcal Filters
- Rocky Mountain Filters
