Aerospatiale (19 models, 411 registered)Agusta Aerospace (3 models, 59 registered)Agusta Spa (9 models, 307 registered)Agusta Westland Philadelphia (1 models, 30 registered)Agustawestland Philadelphia (1 models, 47 registered)Agustawestland Spa (1 models, 7 registered)Bell (40 models, 4490 registered)Bell Helicopter Textron (2 models, 319 registered)Bell Helicopter Textron Canada (7 models, 453 registered)Boeing (3 models, 39 registered)Enstrom Helicopter (2 models, 78 registered)Erickson (2 models, 18 registered)Eurocopter (22 models, 1718 registered)Fairchild Hiller (1 models, 83 registered)Garlick Helicopters (3 models, 31 registered)Hiller (1 models, 90 registered)Hughes (8 models, 747 registered)Hughes Helicopters (2 models, 56 registered)Kaman Aerospace (1 models, 23 registered) Kazan Helicopters (1 models, 16 registered)Keystone Helicopter (1 models, 21 registered)Mbb (1 models, 30 registered)Mcdonnell Douglas (6 models, 247 registered)Md Helicopter (1 models, 34 registered)Md Helicopters (4 models, 137 registered)Messerschmitt (4 models, 64 registered)Messerschmitt-Boelkow-Blohm (1 models, 89 registered)Messerschmitt-Boelkow-Blohm-Gm (1 models, 38 registered)Messerschmitt-Bolkow-Blohm (3 models, 84 registered)Northwest Rotorcraft (1 models, 7 registered)Robinson (1 models, 143 registered)Schweizer (1 models, 22 registered)Sikorsky (19 models, 698 registered)Snias (6 models, 102 registered)Sud Aviation (3 models, 24 registered)Westland Helicopters (1 models, 9 registered)Williams Helicopter (1 models, 9 registered) 37 aircraft manufacturers, 184 airplane models,
10780 airplanes registered,
1