4. Boring or penetrating the earth
  5. With signaling, indicating, testing or measuring
  6. Tool position direction or inclination measuring or...

Steven W. Drews

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Apparatus for arcuate drilling

Boring or penetrating the earth – With signaling – indicating – testing or measuring – Tool position direction or inclination measuring or...
Patent

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Casting method for matrix drill bits and reamers

Metal founding – Process – Shaping liquid metal against a forming surface
Reexamination Certificate

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Casting method for matrix drill bits and reamers

Metal founding – Means to shape metallic material – Including means to hold or position preformed product part...
Reexamination Certificate

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Casting method for matrix drill bits and reamers

Metal founding – Means to shape metallic material – Including means to hold or position preformed product part...
Reexamination Certificate

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Steering sub for flexible drilling

Boring or penetrating the earth – With signaling – indicating – testing or measuring – Tool position direction or inclination measuring or...
Patent

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Profile ID: LFUS-PAI-P-154185

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