Carbovac (France)
BORSIG Membrane Technology (Germany)
John Zink Company (US)
Symex Technologies (US)
Aereon (US)
HY-BON/EDI (US)
Cool Sorption (Denmark)
VOCZero (UK)
Zeeco (US)
Flogistix (US)
Kappa Gi (Italy)
Kilburn Engineering (India)
and others