- High-energy particle physics equipment (44)
- Accelerating waveguide structures (11)
- Atom smasher (particle accelerators) (1)
- Betatrons (1)
- Cyclotrons (5)
- Electron linear accelerators (4)
- Electrostatic particle accelerators (6)
- Linear accelerators (12)
- Particle accelerators, high voltage (6)
- Pulsed electron guns (5)
- Electrical welding equipment (69)
- Electron beam metal cutting, forming or welding machines (27)
- Laser welding, drilling, and cutting equipment (163)
- Welding machines and equipment, ultrasonic (73)
- Electronic training devices (202)
- Countermeasure simulators, electric (26)
- Flight simulators (training aids), electronic (155)
- Teaching machines and aids, electronic (61)
- Automotive driving simulators (training aids), electronic (58)
- Electric sound equipment (130)
- Bells, electric (12)
- Chimes, electric (10)
- Sound signaling devices, electrical (29)
- Underwater sound equipment (22)
- Security devices (888)
- Electric fence chargers (19)
- Security control equipment and systems (722)
- Household electrical equipment (100)
- Appliance cords, for household electrical equipment (59)
- Christmas tree lighting sets, electric (18)
- Christmas tree ornaments, electric (14)
- Door opening and closing devices, electrical (273)
- Extension cords (18)
- Fireplace logs, electric (16)
- Fly traps, electrical (10)
- Insect lamps, electric (12)
- Cleaning equipment, ultrasonic, except medical and dental (101)
- Fire control or bombing equipment, electronic (67)
- Generators, ultrasonic (5)
- Grids, electric (11)
- Heat emission operating apparatus (30)
- Laser systems and equipment (660)
- Lead-in wires, electric lamp (11)
- Maser equipment (1)
- Outboard motors, electric (5)
- Photographic control systems, electronic (26)
- Pulse amplifiers (6)
- Trouble lights (5)
- Waveguide pressurization equipment (3)