4. Wells
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Richard A. Armell

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Centralizing devices for use down-well

Wells – Guide for device or conduit – On sucker or pump rod
Patent

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Centralizing devices for use in bore-holes

Wells – Guide for device or conduit – On sucker or pump rod
Patent

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Downhole pressure and/or temperature gauges

Measuring and testing – Borehole or drilling – Downhole test
Patent

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Downhole tool

Boring or penetrating the earth – With tool shaft detail – Shaft carried guide or protector
Reexamination Certificate

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Piping leakage detection method and apparatus

Measuring and testing – With fluid pressure – Leakage
Patent

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Profile ID: LFUS-PAI-P-971560

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