4. Telephonic communications
  5. Supervisory or control line signaling
  6. Using line or loop condition detection

Denis Dutey

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Device for demultiplexing information encoded according to a...

Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate

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Hands-free telephone apparatus

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection
Patent

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Profile ID: LFUS-PAI-P-1414931

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