4. Hydraulic and earth engineering
  5. Subterranean or submarine pipe or cable laying, retrieving,...
  6. By means advancing along terrain and guiding pipe or cable...

Jack Geelhoed

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Excavating and pipe laying machines

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

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Sensor positioning apparatus for trench excavator

Excavating – Ditcher – Condition responsive
Patent

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Sensor positioning apparatus for trench excavator

Excavating – Ditcher – Condition responsive
Patent

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Trenching method and apparatus

Excavating – Ditcher
Reexamination Certificate

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Profile ID: LFUS-PAI-P-530871

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