1. 3M Company
2. Air Filters Inc.
3. Airex Filter Corporation
4. BC Air Filter LTD.
5. Camfil AB
6. Clark Air Systems
7. Cummins Inc.
8. Daikin Industries
Ltd.
9. Delta Filters & Separators PVT Ltd
10. DENSO Corporation
11. Donaldson Company Inc.
12. Freudenberg Filtration Technologies SE & Co. KG
13. Koch Filter
14. Parker-Hannifin Corporation
15. Spectrum Filtration Pvt. Ltd