4. Boring or penetrating the earth
  5. Boring with explosion in inaccessible hole
  6. With bore condition firing control, or compensating means

Christian C. Spring

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Downhole tool to generate tension pulses on a slickline

Wells – With time or distance measuring – temperature responsive or...
Reexamination Certificate

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Initiator activated by a stimulus

Ammunition and explosives – Blasting – Detonation wave modifying
Reexamination Certificate

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Safety method and apparatus for a perforating gun

Boring or penetrating the earth – Boring with explosion in inaccessible hole – With bore condition firing control – or compensating means
Patent

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Safety method and apparatus for a perforating gun

Boring or penetrating the earth – Boring with explosion in inaccessible hole – With bore condition firing control – or compensating means
Reexamination Certificate

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Well isolation system

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator
Patent

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Profile ID: LFUS-PAI-P-799429

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