4. Electricity: measuring and testing
  5. Electrical speed measuring
  6. Including speed-related frequency generator

Robert J. Holmen

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Digital oscilloscope

Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Electrical property
Patent

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Hand-held magnetic contact tachometer with toothed rotatable whe

Electricity: measuring and testing – Electrical speed measuring – Including speed-related frequency generator
Patent

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Speed sensor for use with an engine analyzer

Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Volume – flow or rate
Patent

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Profile ID: LFUS-PAI-P-1168536

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