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Fault location system with enhanced noise immunity

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

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Fault monitoring by detecting a polarity difference

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

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Fault powered fault indicator having timed reset

Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Nonquantitative
Patent

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Fault test apparatus for conductors of multiconductor cable

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

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Faulted current indicators with improved signal to noise ratios

Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Magnetic saturation
Patent

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Faulted current indicators with improved signal to noise ratios

Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With coupling means
Patent

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Feature extractor for quasi-periodic signals

Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Analysis of complex waves
Patent

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Feature recognition system

Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Analysis of complex waves
Patent

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Ferromagnetic measuring apparatus

Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor
Patent

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Ferromagnetic metal detector utilizing gradiometers positioned o

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

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Ferrous/non-ferrous metal detector using sampling

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

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FET type sensor and a method for driving the same

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

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Fiber optic

Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Using radiant energy
Patent

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Fiber optic arc monitor

Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor
Patent

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Fiber optic current monitor for high-voltage applications

Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Using radiant energy
Patent

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Fiber optic interferometric electric field and voltage sensor ut

Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Using radiant energy
Patent

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Fiber optic probe with a magneto-optic film on an end surface fo

Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Using radiant energy
Patent

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Fiber optic, current measuring devices and method

Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Using radiant energy
Reexamination Certificate

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Fiber optics arrangement for measuring the intensity of an elect

Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Using radiant energy
Patent

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Fiber optics device for measuring the intensity of an electric c

Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Magnetic saturation
Patent

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