4. Boring or penetrating the earth
  5. With tool shaft detail
  6. Shaft carried guide or protector

Argus Machine Co. Ltd.

Corporate Assignee

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Drill stabilizer

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

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Method of injecting pigs into a pipe

Cleaning and liquid contact with solids – Processes – Using solid work treating agents
Reexamination Certificate

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Pigging ball valve

Fluid handling – Systems – Multi-way valve unit
Reexamination Certificate

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Pipe pig injector

Brushing – scrubbing – and general cleaning – Implements – Pipe – tube – or conduit cleaner
Patent

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Pressure switch

Electricity: circuit makers and breakers – Fluid pressure – Piston
Patent

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