4. Telephonic communications
  5. Substation or terminal circuitry
  6. Sidetone control or hybrid circuit

Charles Arnold Lasswell

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Digital telephone system with automatic voice mail redirection

Telephonic communications – Audio message storage – retrieval – or synthesis – Interacting voice message systems
Reexamination Certificate

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IP packet ready PBX expansion circuit for a conventional...

Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate

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PBX with configurable analog CO line and T1 signalling...

Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate

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Phone with adjustable sidetone

Telephonic communications – Substation or terminal circuitry – Sidetone control or hybrid circuit
Patent

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Recording and playing voicemail with improved DTMF detection

Telephonic communications – Audio message storage – retrieval – or synthesis – Message signal analysis
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1353169

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