4. Earth boring, well treating, and oil field chemistry
  5. Earth boring

Barry Hand

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Bed latch position detector and method

Beds – Invalid bed or surgical support
Reexamination Certificate

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Drilling compositions and methods

Earth boring – well treating – and oil field chemistry – Specified breaker component for emulsion or gel
Patent

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Drilling compositions and methods

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
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Drilling compositions and methods

Earth boring – well treating – and oil field chemistry – Earth boring
Patent

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