4. Boring or penetrating the earth
  5. With tool shaft detail
  6. Shaft carried guide or protector
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Roddy John

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Rotary Drilling Technology, LLC

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Rountree Steven P.

Inventor

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Rowe Larry F.

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Russo Robert L.

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Sanchez Hector Adrian

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Sanfead Brian T.

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Sarbu Constantin

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Schillinger Hans

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Schmidt Karl

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Schultz Robert S.

Examiner

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Schuurman W. G.

Representative

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Sedgeman Robert Donald John

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Sheshtawy Adel

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Shinn Kim E.

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Smith International Canada Limited

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Sorokin Abeksandr N.

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Spelts William R.

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Stewart Arthur Deacey

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Strand Stein

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