4. Measuring and testing
  5. Liquid level or depth gauge
  6. Immersible electrode type

Howard Beckerman

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Electronic industrial motor operator control system

Electricity: motive power systems – Motor-reversing – Automatic and/or with time-delay means
Reexamination Certificate

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Electronic water solution level detector

Measuring and testing – Liquid level or depth gauge – Immersible electrode type
Reexamination Certificate

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Fail safe one wire interface for optical emitter-detector...

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2774264

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