4. Boring or penetrating the earth
  5. With below-ground tool drive prime mover
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Lockable motor assembly for use in a well bore

Boring or penetrating the earth – With below-ground tool drive prime mover – Fluid rotary type
Reexamination Certificate

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Locking clutch for downhole motor

Boring or penetrating the earth – With below-ground tool drive prime mover – With positive connection between tool and support shaft for...
Reexamination Certificate

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Long gauge roller vane drilling motor

Boring or penetrating the earth – With below-ground tool drive prime mover – Fluid rotary type
Reexamination Certificate

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