4. Boring or penetrating the earth
  5. Cutter element laterally shiftable below ground
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Method and apparatus for gravel packing of wells

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

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Method and apparatus for rotary mining

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Spring biased
Patent

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Method of setting a pile without noise or vibration and apparatu

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

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Morphable bit

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Plural selectively shiftable cutter elements
Reexamination Certificate

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Motion compensator for drilling from a floater

Boring or penetrating the earth – Cutter element laterally shiftable below ground – With shifting mechanism spring biased to operative position
Reexamination Certificate

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