LandOfFree - US Patents - Listing for Mining or in situ disintegration of hard material,Hard material disintegrating machines,Stepper-type advance-causing means

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Tunnel excavator

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Stepper-type advance-causing means

Patent

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Tunnel-boring machine and method of using the same

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Stepper-type advance-causing means

Reexamination Certificate

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Tunnel-excavating machine

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Stepper-type advance-causing means

Patent

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Tunneling machine

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Stepper-type advance-causing means

Patent

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Tunneling machine

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Stepper-type advance-causing means

Patent

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Tunneling machine with massive guide for impact tools

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Stepper-type advance-causing means

Patent

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Tunneling system

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Stepper-type advance-causing means

Patent

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Tunnelling machine

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Stepper-type advance-causing means

Patent

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Underground excavating machine having independently movable half

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Stepper-type advance-causing means

Patent

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Underground mining machine having temporary roof support means a

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Stepper-type advance-causing means

Patent

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