- Agusta
- Airbus
- Ametek
- APPH
- ATR
- Auxilec
- BAE Systems
- Becker Avionics
- Beech
- Bell Helicopter
- Bendix
- Boeing
- Bombardier
- Britten Norman
- CASA
- Cessna CTS
- Chandler Evans
- Continental
- Curtiss Wright
- Dassault
- Dornier
- Dunlop
- Eaton Corp
- EG & G
- Embraer
- Eurocopter
- Fairchild Dornier
- Franklin
- General Dynamics
- Goodrich
- Hawker Pacific
- Hewlett Packard
- Honeywell NGL
- Hughes
- IAe
- King
- L-3 Communications
- Lockheed Martin
- Lucas
- Mason Electric
- McDonnell Douglas
- Meggit Avionics
- Messier Dowty
- Moog
- Northorp Grumman
- Permail
- Piaggio
- Pilatus
- Pratt & Whitney
- Raytheon
- Rockwell Collins
- Rolls Royce
- SAAB
- Sabre Industries
- Shorts
- Sikorsky
- Smiths Aerospace
- Sweeney
- Telefex
- Timken
- Westland
