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

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

Enclosed structures of very large cross-section, such as conduit

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

Method for constructing a rectangularly shaped tunnel

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

Method of constructing reinforced concrete works such as undergr

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

Method of excavating tunnels

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

Method of manufacturing a tunnel or shaft lining or pipeline

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

Prefabricated structure for the construction of overhead or unde

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

Process for the construction of a segment of an open-air...

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

Sealing arrangement

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

System for articulably bearing a prefabricated structural...

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

Tunnel construction

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

Undercut excavation method

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

Watertight joint seal for concrete structures