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Trencher with foldable rock saw wheel

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Floor-working
Reexamination Certificate

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Trenching machine for cutting preferably frozen ground

Mining or in situ disintegration of hard material – Ice-working devices – Relatively moving cutter
Patent

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Trenching tool assembly with dual indexing capability

Mining or in situ disintegration of hard material – Miscellaneous
Patent

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Triangular blasting into limited voids for vertical free face re

Mining or in situ disintegration of hard material – Tunnel recovery of fluid material
Patent

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Triangular shaped cutting head for use with a longwall mining ma

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Sidewall-working
Patent

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Trim chain take-up sprocket assembly for mining machines and the

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Cutter shiftable vertically
Patent

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Triple branch completion with separate drilling and completion t

Mining or in situ disintegration of hard material – In situ conversion of solid to fluid – Dissolving or chemical reaction
Patent

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Tungsten carbide insert for a cutting tool

Mining or in situ disintegration of hard material – Cutter tooth or tooth head – Wear resistant feature for tool body
Patent

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Tunnel and gallery excavator

Mining or in situ disintegration of hard material – Hard material disintegrating machines – With material-handling means
Patent

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Tunnel boring machine

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

Mining or in situ disintegration of hard material – Automatic control; signaling or indicating – Of tunneling apparatus having a wall temporary support
Patent

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Tunnel boring machine

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

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

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

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

Mining or in situ disintegration of hard material – Hard material disintegrating machines – With mine roof-supporting means
Patent

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Tunnel boring machine

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 anchor shoe structure and process of opera

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

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

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

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