4. Measuring, testing, or signalling instruments
  5. Measuring, regulating or indicating instrument, or casing
  6. Volume, flow or rate

Dong-Chang Lin

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Combined photoelectric and contact digital tachometer

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

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Touchless (photo type) and contact digital dual purpose tachomet

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

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Profile ID: LFUS-PAI-P-982528

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