Acoustic couplers; Batteries; Cameras; Computer peripheral apparatus; Electric switches; Eye glasses; Mobile phones; Punched card office machines; Sunglasses; Telephone sets; Electronic educational apparatus, namely, communication blocks that manipulate and convey information electronically based on their arrangement and are used for cognitive development in disciplines such as counting, spelling or quantitative

'acoust':1 'apparatus':7,23 'arrang':36 'base':33 'batteri':3 'block':26 'camera':4 'card':15 'cognit':41 'communic':25 'comput':5 'convey':30 'count':47 'coupler':2 'develop':42 'disciplin':44 'educ':22 'electr':8 'electron':21,32 'eye':10 'glass':11 'inform':31 'machin':17 'manipul':28 'mobil':12 'name':24 'offic':16 'peripher':6 'phone':13 'punch':14 'quantit':50 'set':20 'spell':48 'sunglass':18 'switch':9 'telephon':19 'use':39

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