channel-selectable transmitters and receivers for use in wireless educational class-room amplification systems, and parts and components for use therewith, namely, loud-speakers, personal listening devices and microphones

'amplif':15 'channel':2 'channel-select':1 'class':13 'class-room':12 'compon':20 'devic':30 'educ':11 'listen':29 'loud':26 'loud-speak':25 'microphon':32 'name':24 'part':18 'person':28 'receiv':6 'room':14 'select':3 'speaker':27 'system':16 'therewith':23 'transmitt':4 'use':8,22 'wireless':10

FREEDOM II

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