4. Wells
  5. With time or distance measuring, temperature responsive or...

QED Environmental Systems, Inc.

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Apparatus and method for underground sampling

Boring or penetrating the earth – Boring without earth removal – Fluid passage to exterior of drive point
Patent

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Apparatus for counting cycles of fluid flow

Measuring and testing – Volume or rate of flow – Expansible chamber
Patent

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Apparatus for counting cycles of fluid flow

Measuring and testing – Volume or rate of flow – Expansible chamber
Patent

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Bladder-type sampling pump controller

Wells – Processes – Operating valve – closure – or changeable restrictor in a well
Reexamination Certificate

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Device for detecting water in product-only pump flow stream

Wells – Automatic – Float controlled valve
Reexamination Certificate

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