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 of, and apparatus for, driving and lining tunnels

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

Method, system and device for building a wall in the ground

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

Methods of and apparatus for applying roof mats to mine workings

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

Methods of and apparatus for driving tunnels

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

Microtunneling systems and methods of use

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

Mill hole liner ring connector assembly

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

Mine door system

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

Mine door system

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

Mine door system

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

Mine roof support plate

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

Mine shaft guide system

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

Mine shaft liner

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

Mine stopping

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

Mine stopping

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

Mine stopping

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

Mine stopping

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

Mine stopping and braces therefor

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

Mine stopping and method of and jack for installing same

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

Mine stopping and method of and jack for installing same