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

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

Mine stopping having a swinging door

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

Mine stopping lap-over panel clamp

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

Mine stopping with man door and door frame assembly

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

Mine stopping, method of constructing same and panels thereof

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

Mine ventilation overcast

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

Mine ventilation panel system

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

Mineshaft closures

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

Mobile train for backfilling tunnel liners with cement grout

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

Movable form front for a tunnel-lining form

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

Movable sealing assembly for tunneling machines

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

Moving steel form system

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

Multiple tier stopping and method of constructing stopping