- Aircraft/aerospace flight instruments and guidance systems (5)
- Acceleration indicators and systems components, aerospace (3)
- Electronic detection systems (aeronautical) (2)
- Gyroscopes (2)
- Inertial guidance systems (1)
- Infrared object detection equipment (1)
- Aircraft control systems, electronic (1)
- Automatic pilots, aircraft (2)
- Radar systems and equipment (1)
- Sonar systems and equipment (3)
- Defense systems and equipment (11)
- Missile guidance systems and equipment (2)
- Search and detection systems and instruments (3)
- Air traffic control systems and equipment, electronic (2)
- Detection apparatus: electronic/magnetic field, light/heat (3)
