4. Boring or penetrating the earth
  5. With above-ground means for handling drilling fluid or cutting
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Harmon Robert L.

Representative

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Harms Gregory W.

Inventor

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Harms Keith W.

Inventor

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Heide Wolfgang M.

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Hoeft Arthur P.

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Hokanson Lyle W.

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Hu Guoqiang

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Hughes Philip M.

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