• Cegelec, a.s.
• Rail Electronics, s.r.o.
• Schneider Electric, s.r.o.
• ZAT, a.s.
• Škoda Electric, a.s.
• Škoda Transportation, s.r.o.
• NSA, Ministry of Defense
• Ingersoll-Rand Technologies, s.r.o.
• EVPÚ, a.s.
• AEF, s.r.o.
and many others …