4. Electricity: electrical systems and devices
  5. Safety and protection of systems and devices
  6. Load shunting by fault responsive means

Alexander Shtulman

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Automatically resetting protection arrangement for a telephone s

Electricity: electrical systems and devices – Safety and protection of systems and devices – Load shunting by fault responsive means
Patent

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Two-wire telecommunications line detection arrangements

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection
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Profile ID: LFUS-PAI-P-276382

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