LandOfFree - US Patents - Listing for Boring or penetrating the earth,With tool shaft detail,Helix or helically arranged structure

Boring or penetrating the earth – With tool shaft detail – Helix or helically arranged structure

Sound attenuating rock drill shank

Boring or penetrating the earth – With tool shaft detail – Helix or helically arranged structure

Spiral ribbed aluminum drillpipe

Boring or penetrating the earth – With tool shaft detail – Helix or helically arranged structure

Stabilizer for drill strings

Boring or penetrating the earth – With tool shaft detail – Helix or helically arranged structure

Stabilizer sleeve for drill string

Boring or penetrating the earth – With tool shaft detail – Helix or helically arranged structure

Straight hole driller

Boring or penetrating the earth – With tool shaft detail – Helix or helically arranged structure

Sub-assembly for dust suppression in rock drilling

Boring or penetrating the earth – With tool shaft detail – Helix or helically arranged structure

Systems and methods for the installation of earth anchors

Boring or penetrating the earth – With tool shaft detail – Helix or helically arranged structure

Systems and methods for the installation of earth anchors

Boring or penetrating the earth – With tool shaft detail – Helix or helically arranged structure

Threaded spacer

Boring or penetrating the earth – With tool shaft detail – Helix or helically arranged structure

Tube auger sections

Boring or penetrating the earth – With tool shaft detail – Helix or helically arranged structure

Tubular drill string member with contoured circumferential surfa

Boring or penetrating the earth – With tool shaft detail – Helix or helically arranged structure

Twist drill

Boring or penetrating the earth – With tool shaft detail – Helix or helically arranged structure

Twist drill bit for rock drilling

Boring or penetrating the earth – With tool shaft detail – Helix or helically arranged structure

Variable depth grooved drill string member