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Underground mining system and method for developing longwall pan

Mining or in situ disintegration of hard material – Processes – Mine safety
Patent

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Undersea mining and separating vehicle having motor-powered wate

Mining or in situ disintegration of hard material – With separation of materials – Separation below surface of earth or water
Patent

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Underspoil slurry haulage

Mining or in situ disintegration of hard material – Processes – With material-handling
Patent

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Underspoil slurry haulage

Mining or in situ disintegration of hard material – Processes – With material-handling
Patent

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Underwater mining

Mining or in situ disintegration of hard material – With separation of materials – Material mined or excavated underwater
Patent

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Underwater mining machine

Mining or in situ disintegration of hard material – With separation of materials – Material mined or excavated underwater
Patent

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Underwater recovery apparatus

Mining or in situ disintegration of hard material – With separation of materials – Separation below surface of earth or water
Patent

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Universal bit holder block connection surface

Mining or in situ disintegration of hard material – Cutter tooth or tooth head
Reexamination Certificate

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Universal digging boom

Mining or in situ disintegration of hard material – Cutter tooth or tooth head – Endless-chain type head
Patent

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Universal ripper miner

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

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Universal ripper miner

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

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Upgrading and mining of coal

Mining or in situ disintegration of hard material – In situ conversion of solid to fluid
Reexamination Certificate

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Upward tunneling

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Rotary cutter head with advance direction coincident or...
Patent

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Uranium leeching process and insitu mining

Mining or in situ disintegration of hard material – In situ conversion of solid to fluid – Input and output wells
Patent

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Use of foam as a borehole ground support system

Mining or in situ disintegration of hard material – Processes – Stabilizing underground structure
Patent

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Vacuum system for milling machine

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

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Vacuumatic concrete planer

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

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Valve openable in response to displacement of a cutting tool

Mining or in situ disintegration of hard material – Cutter tooth or tooth head – Cleansing fluid passage
Patent

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Vane type conveyor for a mining machine drum

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

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Variable wall mining machine

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

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