Portable voice transmitting and receiving equipment for exclusion of ambient noise and voice silencing to prevent disturbance of others, namely, mask voice silencers, transmitters, receivers, and related accessories therefor, namely, ear pieces, antennas, and carrying cases therefor

'accessori':28 'ambient':10 'antenna':33 'carri':35 'case':36 'disturb':17 'ear':31 'equip':6 'exclus':8 'mask':21 'name':20,30 'nois':11 'other':19 'piec':32 'portabl':1 'prevent':16 'receiv':5,25 'relat':27 'silenc':14,23 'therefor':29,37 'transmit':3 'transmitt':24 'voic':2,13,22

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