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GB725383A
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Improvements in or relating to stowage blowing in mine operation
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GB728555A
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Improvements in spacing members for mine supports more particularly for supporting galleries
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US2751157A
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Grinding mill embodying coaxial oppositely rotating grinding disks
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GB731402A
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Improvements in and relating to bridges
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US2797994A
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Method and apparatus for treatment of iron materials in a liquid state
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GB731185A
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Improvements in pit-prop locking devices
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GB762653A
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A plant for operation and control of pit shaft air-lock gates
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GB695091A
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An improved shaft air-lock
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GB757983A
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An improved holder for a cap shoe on caps or roof members for mining
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GB715782A
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An improved spring buffer for railway vehicles
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GB707031A
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An improved method of and apparatus for increasing the cooling effect and economic efficiency of compressed air in mining
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GB716058A
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An improved clamping lock for pit-props
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GB701667A
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Improvements in chain link bending machines
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GB705331A
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Improvements in automatic vehicle couplings
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GB713103A
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Improvements in securing means for automatic locking devices for tiltable track bodies
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GB708552A
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Improvements in and relating to the supply of air to compressed air apparatus, more particularly in subterranean works
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GB713014A
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Improvements in wedging arrangements for pit props
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GB692840A
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An improved process for the oxidation of methane and its homologues to formaldehyde
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GB697260A
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Improved pit support
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GB699924A
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Improvements in yielding ring or arch mine supports
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