interactive, multi-user wireless communications system comprising a base station for receiving and transmitting radio frequency transmissions and hand-held radio transmitters incorporating wireless modems for collecting and transmitting data to said base station via radio frequency transmissions

'base':10,35 'collect':29 'communic':6 'compris':8 'data':32 'frequenc':17,39 'hand':21 'hand-held':20 'held':22 'incorpor':25 'interact':1 'modem':27 'multi':3 'multi-us':2 'radio':16,23,38 'receiv':13 'said':34 'station':11,36 'system':7 'transmiss':18,40 'transmit':15,31 'transmitt':24 'user':4 'via':37 'wireless':5,26

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