4. Television
  5. Two-way video and voice communication
  6. User positioning

Deirdre T. H. Ryan

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Arrangement for serving a telephone office code from two switchi

Telephonic communications – Plural exchange network or interconnection – With interexchange network routing
Patent

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Bidirectional video telephony between cable television and switc

Television – Two-way video and voice communication – User positioning
Patent

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Profile ID: LFUS-PAI-P-623953

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