Collins Aerospace
Environmental Tectonics

Kongsberg Defense
& Aerosapce AS



History : Siam Teltech Co., Ltd. was established in 1971, dealing in communications and aviation electronics solutions, defense electronics systems, air traffic management systems, C4I system, helicopters, hypobaric and hyperbaric chambers, aircrew training systems, voice communication control system and surge protective devices.

  Raytheon Company, U.S.A.
- ATC Products
- Missiles
- Radars
- EW Systems
- Thermal Weapon Sights
- Precision Engagement