computers, relays and printed circuit boards for use in elevators to control the motion of elevators between floors, to provide audio and visual messages to riders, and to relay information regarding movement in and malfunctions of elevators to persons outside the elevators

'audio':21 'board':6 'circuit':5 'comput':1 'control':12 'elev':10,16,37,42 'floor':18 'inform':30 'malfunct':35 'messag':24 'motion':14 'movement':32 'outsid':40 'person':39 'print':4 'provid':20 'regard':31 'relay':2,29 'rider':26 'use':8 'visual':23

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