4. Valves and valve actuation
  5. Tube compressors
  6. Perpendicularly reciprocating tube contacting element

David L. Olson

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Cast iron welding electrodes

Metal treatment – Compositions – Fluxing
Patent

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Cast iron welding materials and method

Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent

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Chamber valve

Valves and valve actuation – Tube compressors – Perpendicularly reciprocating tube contacting element
Patent

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Draft sensor including strain sensor coupled to load strap

Earth working – With indicating or sighting means
Patent

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Gas dissipation chamber for through tubing conveyed ESP...

Wells – Processes – Producing the well
Reexamination Certificate

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Profile ID: LFUS-PAI-P-310581

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