- Aircraft/aerospace flight instruments and guidance systems (3)
- Acceleration indicators and systems components, aerospace (5)
- Airspeed instrumentation (aeronautical instruments) (1)
- Gyroscopes (1)
- Infrared object detection equipment (2)
- Aircraft control instruments (2)
- Aircraft control systems, electronic (1)
- Navigational systems and instruments (2)
- Antennas, radar or communications (2)
- Compasses and accessories (2)
- Radar systems and equipment (2)
- Sonar systems and equipment (1)
- Nautical instruments (1)
- Sextants (1)
- Defense systems and equipment (1)
- Missile guidance systems and equipment (1)
- Detection apparatus: electronic/magnetic field, light/heat (1)
- Electronic field detection apparatus (aeronautical) (1)
- Magnetic field detection apparatus (1)
