American Helicopter Co; Div of Fairchild Aircraft | Hagerstown, | Maryland, |
USA |
Bell Helicopter Corporation | Fort Worth, | Texas, |
USA |
Bell Helicopter Division of Bell Aircraft Corp | Greenville, | New York, |
USA |
Bell Helicopter Textron Inc | Fort Worth, | Texas, |
USA |
Bensen Aircraft Corporation | Raleigh-Durham, | North Carolina, |
USA |
Boeing Vertol | Philadelphia, | Pennsylvania, |
USA |
Brantly Helicopter Corp | Frederick, | Oklahoma, |
USA |
Bristol Aeroplane Company | Filton, | England, |
UK |
Cessna Aircraft Company | Wichita, | Kansas, |
USA |
Focke-Achgelis & Co GmbH | Hoyenkamp, | Lower Saxony, |
Germany |
Gyrodyne Company of America | Saint James, | New York, |
USA |
Hiller Helicopters | Firebaugh, | California, |
USA |
Hughes Helicopters | Culver City, | California, |
USA |
Kaman Aircraft Corporation | Bloomfield, | Connecticut, |
USA |
Kamov Design Bureau (Ka) | Moscow, | |
Russia |
Kellett Autogyro Corporation | Willowgrove, | Pennsylvania, |
USA |
Lockheed Aircraft Corporation | Burbank, | California, |
USA |
McCulloch Aircraft Corporation | Milwaukee, | Wisconsin, |
USA |
McDonnell Douglas Corporation | St Louis, | Missouri, |
USA |
Mil Design Bureaue (Mi) | Moscow, | |
Russia |
Nash-Kelvinator Corporation | Detroit, | Michigan, |
USA |
Piasecki Helicopter Corporation | Morton, | Pennsylvania, |
USA |
Sikorsky Aircraft Div of United Technologies Corp | Stratford, | Connecticut, |
USA |
Westland Aircraft | Yeovil, | England, |
UK |
Westland Helicopters | Yeovil, | England, |
UK |
Yakovlev Design Bureau JSC (YAK) | Moscow, | N Admin Okrug, |
Russia |