4. Excavating
  5. Rotary digger

Erwin Emil Stoetzer

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Construction apparatus with pivotable mast

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
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Device and method for making a trench wall in the soil

Excavating – Rotary digger
Reexamination Certificate

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Device and method for making a trench wall in the soil

Excavating – Rotary digger
Reexamination Certificate

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Method for sinking a borehole in the ground and wet boring tool

Boring or penetrating the earth – Boring without earth removal – Fluid passage to exterior of drive point
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2386144

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