4. Ammunition and explosives
  5. Igniting devices and systems

Robert A. Parrott

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Charge phasing arrangements in a perforating gun

Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature
Patent

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Cooling system for downhole tools

Ammunition and explosives – Blasting – Patterned blasting
Reexamination Certificate

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Gun brake device

Spring devices – Fluid – Expansible-contractible chamber device
Reexamination Certificate

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Impermeable and composite perforating gun assembly components

Ammunition and explosives – Blasting – Borehole loading
Reexamination Certificate

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Insert and twist method and apparatus for securing a shaped char

Ammunition and explosives – Blasting – Patterned blasting
Patent

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Profile ID: LFUS-PAI-P-265298

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