Canadair
Caproni
Caudron
Centre Est Aéronautique
Cessna
Champion Aircraft Corporation
Chengdu Aircraft Company (CAC)
Christen Industries
Cierva Autogiro Company
Cirrus Aircraft Corporation
Comco Ikarus
Commonwealth Aircraft Corporation
Comper Aircraft Company Ltd
Consolidated Aircraft
Construcciones Aeronáuticas SA (CASA)
Convair (Consolidated Vultee Aircraft Corp.)
Curtiss Aeroplane Co. / Curtiss-Wright Corp.
