4. Boring or penetrating the earth
  5. Enlargement of existing pilot throughbore requiring...

Carl E. Keller

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Borehole conductivity profiler

Measuring and testing – Borehole or drilling – Fluid flow measuring or fluid analysis
Reexamination Certificate

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Flexible liner system for borehole instrumentation and sampling

Wells – Processes – Sampling well fluid
Reexamination Certificate

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Horizontal drilling apparatus

Boring or penetrating the earth – Enlargement of existing pilot throughbore requiring...
Patent

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Horizontal drilling method

Hydraulic and earth engineering – Underground passageway – e.g. – tunnel – Boring
Patent

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Horizontal drilling method and apparatus

Hydraulic and earth engineering – Underground passageway – e.g. – tunnel – Boring
Patent

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Profile ID: LFUS-PAI-P-155545

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