US1450329A
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Mine-roof-supporting method and apparatus
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US1330744A
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Stone cutting and handling apparatus
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US1451101A
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Apparatus for mining
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US1330741A
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Method of mining
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US1330743A
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Apparatus for mining roof-props
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CA185789A
|
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Mining machine
|
US1450603A
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Mining apparatus
|
US1440789A
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Machine for mining
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US1440788A
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Machine for mining
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US1440791A
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Mining and loading machine
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US1430669A
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Mining and loading machine
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US1427118A
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Mining and loading machine
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US1163767A
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Portable turnout.
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US1325029A
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Cutting-chain for mining-machines.
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US1456991A
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Mining machine
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US1340731A
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Mining and loading machine
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US1233494A
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|
Mining-machine.
|
US1333627A
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Apparatus for mining purposes
|
US1330742A
|
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Method of mining
|
US1328755A
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Mining-machine
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