4. Telephonic communications
  5. Supervisory or control line signaling
  6. Substation originated

Ronald C. S. Fox

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Battery boosted dial memory

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

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Circuit arrangement for providing power for an IC chip in a tele

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

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Dialler chip mode signal

Telephonic communications – Supervisory or control line signaling – Substation originated
Patent

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Line switch control circuit arrangement for telephone subset

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

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Protection circuit

Electricity: electrical systems and devices – Safety and protection of systems and devices – Voltage regulator protective circuits
Patent

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Profile ID: LFUS-PAI-P-366544

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