4. Communications: electrical
  5. Systems
  6. With specific power supply

Mitsutoshi Ayano

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Battery feed circuit for a pair of subscriber lines

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

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Battery feed circuit for subscriber line

Communications: electrical – Systems – With specific power supply
Patent

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Battery feed circuit for telephone subscriber line

Patent

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Calling signal transmission apparatus

Telephonic communications – Centralized switching system – With generating of call associated substation signal
Patent

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Subscriber line interface circuit

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

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Profile ID: LFUS-PAI-P-327473

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