- Aircraft/aerospace flight instruments and guidance systems (9)
- Acceleration indicators and systems components, aerospace (2)
- Electronic detection systems (aeronautical) (1)
- Infrared object detection equipment (1)
- Omnibearing indicators (1)
- Automatic pilots, aircraft (1)
- Navigational systems and instruments (4)
- Antennas, radar or communications (1)
- Control receivers (1)
- Radar systems and equipment (5)
- Sonar systems and equipment (3)
- Space vehicle guidance systems and equipment (3)
- Nautical instruments (1)
- Defense systems and equipment (10)
- Search and detection systems and instruments (3)
- Detection apparatus: electronic/magnetic field, light/heat (2)
- Electronic field detection apparatus (aeronautical) (2)
