Allison Engine Company (now Rolls-Royce Corporation)
Allied Signal (now Honeywell)
Avco Lycomming (now Honeywell)
Boeing Aircraft Company
CASA
General Electric Company
Hamilton-Sundstrand
Honeywell
Lockheed-Martin
McDonnell-Douglas Corporation (now Boeing)
Pratt & Whitney
Pratt & Whitney Canada
IPT Nurtanio
Rohr Industries (now B. F. Goodrich)
Rolls-Royce
Samsung Aerospace Industries
Snecma
Solar Engines
Teledyne
Turbomeca
Williams International
Volvo Aero Corporation