4. Pipes and tubular conduits
  5. Plural duct

Philip Head

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Bore hole clearing

Wells – With eduction pump or plunger – Having sediment trap or deflector
Reexamination Certificate

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Bore hole safety valves

Wells – With electrical means
Reexamination Certificate

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Cables

Electricity: conductors and insulators – Conduits – cables or conductors – Conductive armor or sheath
Reexamination Certificate

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Casing and method of installing the casing in a well

Wells – Submerged well – Connection or disconnection of submerged members remotely...
Patent

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Conductor system

Electricity: conductors and insulators – Anti-inductive structures – Conductor transposition
Reexamination Certificate

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Profile ID: LFUS-PAI-P-439650

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