9 Avionic sensor systems, namely, aircraft airspeed sensors; Aircraft test boxes for testing power supply and electrical systems; Avionic sensor systems, namely, aircraft altitude indicators; Flight simulators for aircraft; Heads-up displays (HUDs) in the nature of transparent electronic displays for use in general, commercial, and military aviation aircraft; Head-up displays for use in military and commercial aircraft, namely, fixed and helmet mounted transparent electronic displays for providing aircraft crew members with navigational and operational information; Ultrasonic equipment used to test or inspect damage to aircraft; aircraft avionics, namely, auto flight systems comprised primarily of airspeed sensors, altitude sensors, GPS instruments, temperature gauges, fuel gauges, oil gauges, pressure gauges, speedometers, tachometers, and directional compasses, flight control systems composed primarily of airspeed sensors, altitude sensors, global positions system (GPS) instruments, temperature gauges, fuel gauges, oil gauges, pressure gauges, speedometers, tachometers, and directional compasses; autopilot computers; aircraft avionics, namely, aircraft air speed systems comprised primarily of airspeed sensors, altitude sensors, global positions system (GPS) instruments, temperature gauges, fuel gauges, oil gauges, pressure gauges, speedometers, tachometers, and directional compasses; aircraft avionics, namely, navigation systems composed primarily of airspeed sensors, altitude sensors, global positions system (GPS) instruments, temperature gauges, fuel gauges, oil gauges, pressure gauges, speedometers, tachometers, and directional compasses; electrical wire for use in aircraft, aircraft elevator and horizontal stabilizer actuators, aircraft cabin temperature control and pressure control systems comprised primarily of temperature and pressure sensors, fire protection and detection systems for use in aircraft comprised primarily of fire alarms and fire extinguishing apparatus, electronic instrument display panels for use in aircraft, and ignition systems for aircraft comprised primarily of ignition batteries