4. Hydraulic and earth engineering
  5. Subterranean or submarine pipe or cable laying, retrieving,...
  6. Repair, replacement, or improvement

Dietmar Jenne

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Anchoring apparatus for the boring wagon of a mobile earth borin

Boring or penetrating the earth – With above-ground means to advance or retract boring means
Patent

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Apparatus for controlling a ramming device

Boring or penetrating the earth – Boring without earth removal
Patent

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Apparatus for controlling the feed drive of a boring mechanism f

Boring or penetrating the earth – Automatic control – Of advance or applied tool weight
Patent

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Apparatus for making earth bores

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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Apparatus for pulling a pipe into an earth bore

Wells – Means for perforating – weakening – bending or separating pipe... – Perforating or splitting cutter
Patent

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Profile ID: LFUS-PAI-P-319608

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