C

PHOTOELECTRIC CELLS, PHOTOTRANSISTORS, PHOTOTRANSISTOR ASSEMBLIES, OPTICAL SWITCHES, PHOTO DIODES, OPTO-ISOLATORS, LIGHT EMITTING DIODES, KITS CONTAINING PHOTOELECTRIC CELLS, PHOTOELECTRIC PARTS OF PHOTOELECTRIC CELLS, ELECTRIC CIRCUITS CONTAINING PHOTOELECTRIC CELLS, PHOTOELECTRIC CELLS OF THE PHOTOCONDUCTIVE TYPE AND PARTS THEREOF, KITS CONTAINING PHOTOELECTRIC CELLS OF THE PHOTOCONDUCTIVE TYPE AND ELECTRIC CIRCUITS CONTAINING PHOTOELECTRIC CELLS OF THE PHOTOCONDUCTIVE TYPE AND PARTS THEREOF