4. Boring or penetrating the earth
  5. With receptacle
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Cable tool with circulating drill stem

Boring or penetrating the earth – With receptacle
Patent

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Down-hole tool filter and method for protecting such tools...

Boring or penetrating the earth – With receptacle – Sieve or strainer
Reexamination Certificate

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Downhole cutting mill

Boring or penetrating the earth – With receptacle – Sieve or strainer
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Drilling tool for use in constructing large diameter piles, vent

Boring or penetrating the earth – With receptacle
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Earth boring tool

Boring or penetrating the earth – With receptacle – Sieve or strainer
Patent

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Junk basket, bit and reamer stabilizer

Boring or penetrating the earth – With receptacle
Patent

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Pile reamer with spoil container

Boring or penetrating the earth – With receptacle – Suspended below bit
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0
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