4. Electricity: measuring and testing
  5. Measuring, testing, or sensing electricity, per se
  6. Balancing

John J. Zelle

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Instrument to measure the errors of apparent power meters

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

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RMS measuring apparatus for AC/DC voltages

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

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Profile ID: LFUS-PAI-P-664521

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