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Actuator for an appliance associated with a ducted body, especia

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Cutter element shifted by fluid pressure
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Actuator underreamer

Boring or penetrating the earth – Cutter element laterally shiftable below ground
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Advanced expandable reaming tool

Boring or penetrating the earth – Cutter element laterally shiftable below ground
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Advanced expandable reaming tool

Boring or penetrating the earth – Cutter element laterally shiftable below ground
Reexamination Certificate

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Advanced expandable reaming tool

Boring or penetrating the earth – Cutter element laterally shiftable below ground
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Anchoring device and method for settling the device in the groun

Boring or penetrating the earth – Cutter element laterally shiftable below ground – With separable means holding tool collapsed above ground only
Patent

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Apparatus for drilling enlarged boreholes

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Cutter element shifted by fluid pressure
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Apparatus for extracting minerals through a borehole

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Cutter element shifted by fluid pressure
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Apparatus for rotary mining

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Cutter element shifted by longitudinally relatively movable...
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