- Acticarb Inc
- American Environmental Svc
- American Industrial Partners
- Barnebey Sutcliffe
- Beard Co
- Bousum's Transport Inc
- Boutique
- Boutique Africana
- Boutique Des Chapeaux
- Calgon Carbon Corp
- Calgon Carbon Corp
- California Carbon Co Inc
- California Carbon Co Inc
- Carbon Central
- Carbon Filtration Systems
- Carbon Services Northwest
- Carbon Services Northwest
- Carbon Services Northwest
- Carbtrol Corp
- Denbury Resources Inc
- Great Lakes Carbon Corp
- Great Lakes Carbon Corp
- Hepner Air Filter
- Horsehead Resource Development
- Liberty Carbon Svc
- Matterhorn Filter Corp
- Norit Americas Inc
- Nucon International Inc
- Pica USA Inc
- Process Engineering Svc
- Scientific Emulation Inc
- Service Tech Inc
- Service Tech Inc
- Ted D Miller & Assoc Inc
- United Manufacturing Intl 2000
- Zoltek Co Inc
- Zoltek Corp
- Zoltek Corp
