LandOfFree - US Patents - Listing for Boring or penetrating the earth,With below-ground tool drive prime mover

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III-V system compound semiconductor device and method for manufa

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

Patent

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Improved mud motor system incorporating fluid bearings

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

Patent

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In-hole motor drill with bit clutch

Boring or penetrating the earth – With below-ground tool drive prime mover – With positive connection between tool and support shaft for...

Patent

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In-hole motor drill with locking bit clutch

Boring or penetrating the earth – With below-ground tool drive prime mover – With positive connection between tool and support shaft for...

Patent

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In-hole motor drill with locking bit clutch

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

Patent

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In-hole motor drill with locking bit clutch

Boring or penetrating the earth – With below-ground tool drive prime mover – With positive connection between tool and support shaft for...

Patent

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In-hole motor with bit clutch

Boring or penetrating the earth – With below-ground tool drive prime mover – With below-ground conveyer or impeller for removal of cuttings

Patent

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Indexing percussive drilling bit

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

Patent

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Intermittent high-drag oil well drilling methods and apparatus

Boring or penetrating the earth – With below-ground tool drive prime mover – Below-ground storage of motivating energy

Patent

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Intermittently rotatable down hole drilling tool

Boring or penetrating the earth – With below-ground tool drive prime mover – With mechanical motion-converting means

Patent

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Inverted motor for drilling rocks, soils and man-made...

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

Reexamination Certificate

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Inverted motor for drilling rocks, soils and man-made...

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

Reexamination Certificate

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