4. Excavating
  5. Ditcher
  6. Wheel excavator

Sylvester J. Liebrecht, Jr.

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Rotating disk-type ditcher

Excavating – Ditcher – Wheel excavator
Patent

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Trencher plow for laying pipe

Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – By means advancing along terrain and guiding pipe or cable...
Reexamination Certificate

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Profile ID: LFUS-PAI-P-845574

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