4. Metallurgical apparatus
  5. Process
  6. Tuyere operation

Guy Randall

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Apparatus and method for a drilling assembly

Boring or penetrating the earth – Automatic control – Of advance or applied tool weight
Reexamination Certificate

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Blow pipe and gas lance for blast furance

Metallurgical apparatus – Process – Tuyere operation
Patent

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Column selector for pipe section magazine of directional drill

Material or article handling – Cylindrical bar handling device – Including ramp and retractable stop or ejector
Reexamination Certificate

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Drive mechanism for boring machine

Boring or penetrating the earth – With means to feed drive
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1193334

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