LandOfFree - US Patents - Listing for Hydraulic and earth engineering,Underground passageway, e.g., tunnel

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Device for joining tunnel segments

Hydraulic and earth engineering – Underground passageway – e.g. – tunnel – Sectional

Reexamination Certificate

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Device for joining two members together

Hydraulic and earth engineering – Underground passageway – e.g. – tunnel – Lining

Patent

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Device for laying and suspending cables

Hydraulic and earth engineering – Underground passageway – e.g. – tunnel – Lining

Patent

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Device for limiting stresses in particular for buried tubular st

Hydraulic and earth engineering – Underground passageway – e.g. – tunnel – Lining

Patent

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Device for opening and supporting a headway

Hydraulic and earth engineering – Underground passageway – e.g. – tunnel – Boring

Patent

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Device for the mutual support of two construction members

Hydraulic and earth engineering – Underground passageway – e.g. – tunnel – Lining

Reexamination Certificate

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Direction correcting device for shield tunnelling machine

Hydraulic and earth engineering – Underground passageway – e.g. – tunnel – Boring

Patent

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Drill head for a microtunnelling apparatus

Hydraulic and earth engineering – Underground passageway – e.g. – tunnel – Boring

Reexamination Certificate

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Drilling apparatus and method for its control

Hydraulic and earth engineering – Underground passageway – e.g. – tunnel – Boring

Patent

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Drive shield

Hydraulic and earth engineering – Underground passageway – e.g. – tunnel – Boring

Patent

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Drive shield

Hydraulic and earth engineering – Underground passageway – e.g. – tunnel – Boring

Patent

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Drive shields for tunnel-driving apparatus

Hydraulic and earth engineering – Underground passageway – e.g. – tunnel – Boring

Patent

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Driving process of enlarged tunnel

Hydraulic and earth engineering – Underground passageway – e.g. – tunnel – Lining

Patent

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