4. Measuring and testing
  5. Volume or rate of flow
  6. Using differential pressure

Wilbert E. Beller

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Digital fluid flow rate sensor

Measuring and testing – Volume or rate of flow – Using differential pressure
Patent

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Liquid level sensor assembly

Communications: electrical – Condition responsive indicating system – Specific condition
Patent

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Magnetically latching and current sensitive automatically unlatc

Electricity: electrical systems and devices – Safety and protection of systems and devices – Motor protective condition responsive circuits
Patent

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Switch construction

Electricity: circuit makers and breakers – Liquid contact – Time delay
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Profile ID: LFUS-PAI-P-596382

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