Optical sensors, electro-optical sensors; opto-electrical apparatus for securing rooms and parts thereof, namely opto-electric sensors for gates; opto-electric sensors for doors; opto-electrical motion sensors; electrical and electronic apparatus and systems in the nature of opto-electrical sensors; electrical switches, in particular light barriers and light curtains

'apparatus':10,38 'barrier':54 'curtain':57 'door':29 'electr':9,20,26,32,35,47,49 'electro':4 'electro-opt':3 'electron':37 'gate':23 'light':53,56 'motion':33 'name':17 'natur':43 'optic':1,5 'opto':8,19,25,31,46 'opto-electr':7,18,24,30,45 'part':15 'particular':52 'room':13 'secur':12 'sensor':2,6,21,27,34,48 'switch':50 'system':40 'thereof':16

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