4. Telephonic communications
  5. Subscriber line or transmission line interface
  6. Power supply

Laurens C. Van Leeuwen

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Communication set with detection of set function and line...

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

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Wire bound telecommunications device and a power supply circuit

Telephonic communications – Subscriber line or transmission line interface – Power supply
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2704137

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