4. Measuring, testing, or signalling instruments
  5. Security or signal instrument or casing
  6. Alarm or control thereof

Roger J. Tosto

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Telephone line hold and hold release apparatus

Telephonic communications – Substation or terminal circuitry – Hold circuit
Patent

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Telephone set

Recording – communication – or information retrieval equipment – Computer – data processor equipment
Patent

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Telephone set

Recording – communication – or information retrieval equipment – Computer – data processor equipment
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Telephone set

Recording – communication – or information retrieval equipment – Computer – data processor equipment
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Telephone set

Recording – communication – or information retrieval equipment – Computer – data processor equipment
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

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Profile ID: LFUS-PAI-P-40145

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