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US3083955A
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Mining machines having parallel auger strings
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US2946275A
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Cooking apparatus
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US2838295A
|
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Bit holder for holding a plurality of bits
|
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US2764397A
|
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Auger mining apparatus having rigidly attached transverse conveyor
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US2848209A
|
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Dehydrating apparatus
|
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US2848210A
|
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Dehydrating gypsum or the like
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US2751203A
|
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Advanceable mining machine head and shaft carried bearing support therefor
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US2715029A
|
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Tiltable machine supporting structure
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US2760624A
|
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Screw conveyor and manufacture thereof
|
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US2719708A
|
|
Pan guideway for rotary mining head
|
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US2616677A
|
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Mining machine
|
|
US2784955A
|
|
Rotary mining machine cutter head with rear helically extending transverse opening
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US2760255A
|
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Screw conveyor and manufacture thereof
|
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US2594256A
|
|
Mining machine head
|
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US2562841A
|
|
Mining machine head
|
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CA609377A
|
|
Mining machine head
|
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CA549814A
|
|
Mining machine
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CA541365A
|
|
Mining machine head
|
|
CA549816A
|
|
Screw conveyor and manufacture thereof
|
|
CA579285A
|
|
Dehydrating apparatus
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