4. Boring or penetrating the earth
  5. Bit or bit element
  6. Rolling cutter bit or rolling cutter bit element
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Walk Howard J.

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Walker-Neer Manufacturing Co.

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Walter James C.

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Wang DeXin

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Watson Dean

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Wave Tec G.m.b.H.

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Wells Jennifer Ann

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Welsh Michael F.

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Westermark Gustav L.

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White Alysia

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White Alysia C.

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White Brian A

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White Brian A.

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Wick Thomas A.

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Wiesner Brian

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Wiesner Brian Andrew

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Wiesner Brian C.

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Wiesner Brian Christopher

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Williams Sybil J.

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Witman George Bodo

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