4. Telephonic communications
  5. Call signal generating

Robert V. Burns

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Initial rate override circuit

Patent

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Isolated drive circuit

Telephonic communications – Call signal generating
Patent

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Low frequency sinewave generator

Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
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Overload detector and protection circuit

Electricity: electrical systems and devices – Safety and protection of systems and devices – Voltage regulator protective circuits
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Ring signal generator for generating ring signals of different f

Telephonic communications – Call signal generating
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Profile ID: LFUS-PAI-P-130320

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