- Aircraft/aerospace flight instruments and guidance systems (10)
- Acceleration indicators and systems components, aerospace (1)
- Electronic detection systems (aeronautical) (2)
- Inertial guidance systems (1)
- Infrared object detection equipment (1)
- Aircraft control instruments (1)
- Aircraft control systems, electronic (2)
- Automatic pilots, aircraft (1)
- Navigational systems and instruments (1)
- Antennas, radar or communications (2)
- Compasses and accessories (3)
- Control receivers (1)
- Radar systems and equipment (7)
- Sonar systems and equipment (7)
- Space vehicle guidance systems and equipment (1)
- Nautical instruments (1)
- Sextants (1)
- Defense systems and equipment (11)
- Missile guidance systems and equipment (1)
- Warfare counter-measure equipment (3)
- Search and detection systems and instruments (5)
- Air traffic control systems and equipment, electronic (3)
- Detection apparatus: electronic/magnetic field, light/heat (6)
- Electronic field detection apparatus (aeronautical) (1)
- Magnetic field detection apparatus (2)
- Distance measuring equipment (1)
- Radio magnetic instrumentation (1)
