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

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Underground rock chutes

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

Patent

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Underground structural work including prefabricated elements...

Hydraulic and earth engineering – Underground passageway – e.g. – tunnel – Cut and cover

Reexamination Certificate

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Underground tubular structural system and process for producing

Hydraulic and earth engineering – Underground passageway – e.g. – tunnel – Cut and cover

Patent

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Underground tubular structural system and process for producing

Hydraulic and earth engineering – Underground passageway – e.g. – tunnel – Cut and cover

Patent

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Underground work chamber assembly and method for the constructio

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

Patent

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Underwater tunnel and an underwater mooring apparatus to moor th

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

Patent

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Underwater tunnel construction

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

Patent

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Wall supporting arrangement, especially for supporting mine gall

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

Patent

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Water-tight bore shaft foundation

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

Patent

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Waterproof cladding construction and method of providing the...

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

Reexamination Certificate

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Watertight joint seal for concrete structures

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

Reexamination Certificate

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Wedge member for assembling tunnel shield voussoirs

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

Patent

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Welded grid, primarily for securing underground cavities, cavity

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

Patent

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