3M Company (USA)

A.L.Filter (Israel)

AAF Flanders (USA)

Aerospace America Inc. (USA)

Ahlstrom-Munksj? (Sweden)

Airex Filter Corporation (USA)

AIRTECH Japan Ltd. (Japan)

Atlas Copco (Sweden)

Blueair AB (Sweden)

Bruce Air Filter Company (USA)

Camfil Group (Sweden)

Clarcor Air Filtration Products, Inc. (USA)

Clarcor Industrial Air (USA)

Cummins, Inc. (USA)

Cummins Filtration (USA)

Donaldson Co., Inc. (USA)

Delta Filtration (Ireland)

Dust Free? Inc. (USA)

Filtration Group Inc. (USA)

Purafil Inc. (USA)

Filtration Systems Products Inc. (USA)

Freudenberg Group (Germany)

Freudenberg Filtration Technologies

GVS Group (Italy)

Lydall Inc. (USA)

Koch Filter Corporation (USA)

Mann+Hummel Group (Germany)

Nordic Air Filtration A/S (Denmark)

Sogefi SpA (Italy)

Spectrum Filtration Pvt. Ltd. (India)

Trion Inc. (USA)