4. Measuring and testing
  5. Liquid level or depth gauge
  6. With illumination

Douglas J. Belshaw

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Borehole packer

Wells – Packers or plugs – Expanded by confined fluid from central chamber – pump or...
Patent

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Down-hole liquid detecting apparatus

Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Content or effect of a constituent of a liquid mixture
Patent

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Groundwater sampling apparatus

Measuring and testing – Sampler – sample handling – etc. – Capture device
Patent

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Liquid-level detector

Measuring and testing – Liquid level or depth gauge – With illumination
Patent

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Packing-seal for boreholes

Wells – Packers or plugs – Expanded by confined fluid from central chamber – pump or...
Patent

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Profile ID: LFUS-PAI-P-5815

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