Proximity sensors for sensing the presence or absence of mobility-impaired individuals in relation to mobility aids not being part of mobility aids

'absenc':8 'aid':18,24 'impair':12 'individu':13 'mobil':11,17,23 'mobility-impair':10 'part':21 'presenc':6 'proxim':1 'relat':15 'sens':4 'sensor':2

proximity sensors for sensing the presence or absence of mobility-impaired individuals in relation to mobility aids sold as an integral component of walkers to aid in mobility

'absenc':8 'aid':18,27 'compon':23 'impair':12 'individu':13 'integr':22 'mobil':11,17,29 'mobility-impair':10 'presenc':6 'proxim':1 'relat':15 'sens':4 'sensor':2 'sold':19 'walker':25

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