4. Electricity: measuring and testing
  5. Measuring, testing, or sensing electricity, per se
  6. Frequency of cyclic current or voltage

John M. Saunders

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Electrical signal frequency detector

Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By frequency
Patent

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Electrical signal phase detector

Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent

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Traction motor fault detection system

Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of electrically operated apparatus
Reexamination Certificate

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Profile ID: LFUS-PAI-P-738103

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