1. 3M Company
2. A.G Industries Pvt. Ltd.
3. Absolent Air Care Group AB
4. Air Cleaning Specialists Inc.
5. Airex Filter Corporation
6. AJR Filtration
7. Atlas Copco AB
8. Camfil group
9. Columbus Industries Corporation
10. Denso Corporation
11. Donaldson Company Inc.
12. Filtration Group Corporation
13. Freudenberg Filtration Technologies GmbH & Co. KG
14. Global Filter LLC
15. Hebei Linaier Rubber Products Co. Ltd.
16. Honeywell Corporation Inc.
17. Hongtek Filtration Co. Ltd.
18. Koch Filter by Johnson & Johnson Services Inc.
19. OGAYA Filter Co. Ltd.
20. PARKER HANNIFIN CORP
21. Pleatco LLC
22. Siemens Aktiengesellschaft
23. Spectrum Filtration Pvt. Ltd.
24. Tex-Air Filters
25. Troy Filters Ltd.
26. Veolia USA Inc.
27. Xinxiang City Huahang Filter Co.Ltd.