Electronic advertisement boards featuring a neon lamp; Electronic notice boards; Fluorescent screens; Light emitting diodes (LEDs); Lighting ballasts; Mechanical signs; Neon signs; OLED (Organic light emitting diode) display panels; Optical character readers; Optical lanterns; Road signs, luminous or mechanical; Signs, luminous; Slide boxes; Traffic-light apparatus; Transformers; Triodes; Digital signal processors; Electric light dimmers; Flashing safety lights; Luminous variable/dynamic signs using light emitting diodes and electronic controllers to produce real-time and programmable messages and information displays; Voltage regulators

'advertis':2 'apparatus':47 'ballast':18 'board':3,10 'box':43 'charact':31 'control':68 'digit':50 'dimmer':55 'diod':15,27,65 'display':28,79 'electr':53 'electron':1,8,67 'emit':14,26,64 'featur':4 'flash':56 'fluoresc':11 'inform':78 'lamp':7 'lantern':34 'led':16 'light':13,17,25,46,54,58,63 'lumin':37,41,59 'mechan':19,39 'messag':76 'neon':6,21 'notic':9 'ole':23 'optic':30,33 'organ':24 'panel':29 'processor':52 'produc':70 'programm':75 'reader':32 'real':72 'real-tim':71 'regul':81 'road':35 'safeti':57 'screen':12 'sign':20,22,36,40,61 'signal':51 'slide':42 'time':73 'traffic':45 'traffic-light':44 'transform':48 'triod':49 'use':62 'variable/dynamic':60 'voltag':80

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