- Aircraft/aerospace flight instruments and guidance systems (3)
- Acceleration indicators and systems components, aerospace (1)
- Aircraft flight instruments (2)
- Altimeters, standard and sensitive (1)
- Infrared object detection equipment (1)
- Instrument landing systems (ILS), airborne or ground (1)
- Aircraft control instruments (1)
- Aircraft control systems, electronic (2)
- Navigational systems and instruments (4)
- Radar systems and equipment (1)
- Search and detection systems and instruments (1)
- Detection apparatus: electronic/magnetic field, light/heat (1)
