LandOfFree - US Patents - Listing for Boring or penetrating the earth,Boring without earth removal

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Earth borer

Boring or penetrating the earth – Boring without earth removal

Reexamination Certificate

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Earth boring apparatus

Boring or penetrating the earth – Boring without earth removal

Reexamination Certificate

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Earth boring apparatus and method with control valve

Boring or penetrating the earth – Boring without earth removal

Patent

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Earth boring assembly with drag pipe

Boring or penetrating the earth – Boring without earth removal – Drive point detached from shaft to form cased bore or with...

Patent

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Earth boring head

Boring or penetrating the earth – Boring without earth removal

Patent

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Earth boring method and apparatus

Boring or penetrating the earth – Boring without earth removal – Combined with earth removal

Patent

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Earth penetration

Boring or penetrating the earth – Boring without earth removal

Patent

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Earth piercing apparatus

Boring or penetrating the earth – Boring without earth removal

Patent

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Excavating tool

Boring or penetrating the earth – Boring without earth removal – Combined with earth removal

Reexamination Certificate

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Expendable protective sleeve and method of use for soil and grou

Boring or penetrating the earth – Boring without earth removal – Combined with earth removal

Patent

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Extended soil sampling head

Boring or penetrating the earth – Boring without earth removal – Combined with earth removal

Patent

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Externally vented drive head with solid center

Boring or penetrating the earth – Boring without earth removal – Combined with earth removal

Reexamination Certificate

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