4. Telephonic communications
  5. Subscriber line or transmission line interface
  6. Network interface device

Masami Nashirozawa

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Calling signal controller

Telephonic communications – Multi-line or key substation system with selective switching... – Switching or supervision feature
Patent

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Telephone system for voice recognition

Telephonic communications – Audio message storage – retrieval – or synthesis – Voice activation or recognition
Reexamination Certificate

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Trunk interface circuit having function of battery feed to centr

Telephonic communications – Subscriber line or transmission line interface – Network interface device
Patent

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Profile ID: LFUS-PAI-P-1593440

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