4. Telephonic communications
  5. Special services
  6. Call diversion

William J. Curtin

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Call screening system

Telephonic communications – Special services – Call diversion
Patent

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Compact keyboard system

Communications: electrical – Audible indication – Percussion-type sound producer
Patent

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Computer data entry method and apparatus

Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
Patent

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Control system for handling direct inward dialed telephone calls

Patent

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Method and system for identifying telephone callers

Telephonic communications – Audio message storage – retrieval – or synthesis – Multilingual system or operation
Patent

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Profile ID: LFUS-PAI-P-433293

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