LandOfFree - US Patents - Listing for Boring or penetrating the earth

Boring or penetrating the earth – With tool drive prime mover or above-ground mechanical... – Drive reciprocates tool

Hammer device

Boring or penetrating the earth – Below-ground impact members – Fluid-operated

Hammer device

Boring or penetrating the earth – With above-ground means to impact an earth-penetrating means

Hammer device

Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – With tool shaft having plural passages for drilling fluid

Hammer drill bit and sub-assembly

Boring or penetrating the earth – Below-ground impact members – Fluid-operated

Hammer drill device

Boring or penetrating the earth – With below-ground tool drive prime mover

Hammer drills for making boreholes

Boring or penetrating the earth – With below-ground tool drive prime mover

Hammer drills for making boreholes

Boring or penetrating the earth – Processes – Boring with specific fluid

Hammer for use in a bore hole and apparatus for use therewith

Boring or penetrating the earth – With below-ground tool drive prime mover

Hammer stabilizer

Boring or penetrating the earth – Below-ground impact members

Hammer type soil excavating machine

Boring or penetrating the earth – Bit or bit element – Axially parallel side wall with transverse cuttings...

Hand auger

Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – With valve

Hand held water drilling apparatus

Boring or penetrating the earth – With above-ground means to impact an earth-penetrating means

Hand-held smoker's device for sidestream smoke control

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Hard facing for milled tooth rock bits

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Hard facing material for rock bits

Boring or penetrating the earth – Bit or bit element – Impact or percussion type

Hard material bit

Boring or penetrating the earth – Bit or bit element – Specific or diverse material

Hard material insert for a drill and a drill with the hard...

Boring or penetrating the earth – Bit or bit element – Specific or diverse material

Hard metal or hard material tipped drilling, chipping and cuttin

Boring or penetrating the earth – Bit or bit element – Impact or percussion type

Hard metal plate for rock drill and rock drill