4. Metal working
  5. Method of mechanical manufacture
  6. Electrical device making

Harold A. Kelly

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Automatic visual measurement of surface mount device placement

Metal working – Method of mechanical manufacture – Electrical device making
Patent

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Device for subsurface flaw detection in reflective materials by

Radiant energy – Infrared-to-visible imaging
Patent

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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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Profile ID: LFUS-PAI-P-194622

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