4. Boring or penetrating the earth
  5. Boring without earth removal
  6. Drive point detached from shaft to form cased bore or with...
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Method and apparatus for installing a micro-well with a penetrom

Boring or penetrating the earth – Boring without earth removal – Drive point detached from shaft to form cased bore or with...
Patent

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Method and device for drilling a hole and for securing an...

Boring or penetrating the earth – Boring without earth removal – Drive point detached from shaft to form cased bore or with...
Reexamination Certificate

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Method and device for the drilling of holes in ground or...

Boring or penetrating the earth – Boring without earth removal – Drive point detached from shaft to form cased bore or with...
Reexamination Certificate

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Method for embedding lines, anchoring cables, and sinking wells

Boring or penetrating the earth – Boring without earth removal – Drive point detached from shaft to form cased bore or with...
Patent

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Method for pressure- and flow-preventive fixing of pipes in...

Boring or penetrating the earth – Boring without earth removal – Drive point detached from shaft to form cased bore or with...
Reexamination Certificate

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