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

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

Method for boring hole in the ground and apparatus therefor

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

Method for building large span tunnels by means of a cellular ar

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 – Boring

Method for constructing a tunnel

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

Method for constructing an enlarged tunnel and apparatus for for

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

Method for controlling the direction of a shield tunneling machi

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

Method for displacing oxygen from a mine

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

Method for lining tunnel wall formed by shield excavation

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

Method for reducing frictional losses in tunnels

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

Method for reinforcing tunnel linings

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

Method for removal of broken ground

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

Method for repairing in-ground tunnel structures

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

Method for the construction of long tunnel with a lining

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

Method for the production of a cavity limited by a flexible mate

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

Method for underground excavation

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

Method for widening road, superhighway or railway tunnels,...

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

Method of and apparatus for building thin lining on tunnel

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

Method of and apparatus for concrete tunnel lining

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

Method of and apparatus for concrete tunnel lining