4. Boring or penetrating the earth
  5. With tool shaft detail

Gerhard Völkel

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Drilling device comprising a rotational drive

Boring or penetrating the earth – With tool shaft detail
Reexamination Certificate

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Method and device for drilling a channel

Boring or penetrating the earth – Enlargement of existing pilot throughbore requiring...
Reexamination Certificate

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Method and device for drilling a channel

Boring or penetrating the earth – Enlargement of existing pilot throughbore requiring...
Reexamination Certificate

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Method for producing earth boreholes

Boring or penetrating the earth – Processes – Boring horizontal bores
Reexamination Certificate

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Profile ID: LFUS-PAI-P-3100256

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