Inverters; Accumulators, electric; Anode batteries; Batteries, electric; Batteries, electric, for vehicles; Battery chargers; Current rectifiers; Educational apparatus, namely, manipulative blocks used as teaching aids for the visualization of math concepts; Electric cables and wires; Galvanic cells; Grids for batteries; Plates for batteries; Power line conditioners; Power switches; Solar batteries

'accumul':2 'aid':24 'anod':4 'apparatus':17 'batteri':5,6,8,12,39,42,49 'block':20 'cabl':32 'cell':36 'charger':13 'concept':30 'condition':45 'current':14 'educ':16 'electr':3,7,9,31 'galvan':35 'grid':37 'invert':1 'line':44 'manipul':19 'math':29 'name':18 'plate':40 'power':43,46 'rectifi':15 'solar':48 'switch':47 'teach':23 'use':21 'vehicl':11 'visual':27 'wire':34

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