4. Telephonic communications
  5. Audio message storage, retrieval, or synthesis

Grigor K. Kotzev

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Audio caller identification unit

Telephonic communications – Audio message storage – retrieval – or synthesis
Patent

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Extension-in-use exclusion apparatus

Telephonic communications – Multi-line or key substation system with selective switching... – With exclusion or priority feature
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Profile ID: LFUS-PAI-P-427693

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