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US2811427A
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Lignite fuel
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US2708654A
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Apparatus for producing lignite fuel product
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US2688478A
|
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Apparatus for reducing and smelting ore, producing gas, and generating power
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US2610115A
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Method for dehydrating lignite
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US2529301A
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Apparatus for making endless v-belts
|
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US2500553A
|
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Apparatus for smelting low-grade ores
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US2468337A
|
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Bladed shear reducing mill
|
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US2503555A
|
|
Ore conditioning and reduction process
|
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US2497088A
|
|
Vortical classifying machine
|
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US2440285A
|
|
Pulverizing and classifying machine having a rotor comprising superimposed sections
|
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US2448038A
|
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Disintegrator and vortical classifier for solids
|
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US2380321A
|
|
Pulverizing and classifying apparatus
|
|
US2333111A
|
|
Apparatus for processing ores
|
|
US2392331A
|
|
Pulverizing and classifying machine
|
|
US2329208A
|
|
Pulverizing and classifying machine
|
|
US2362142A
|
|
Pulverizing and classifying machine
|
|
US2222437A
|
|
Material handling device
|
|
US2304264A
|
|
Apparatus for pulverizing and classifying materials
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|
US2269465A
|
|
Method of treating iron ore
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US2294921A
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Mechanism for delivering pulverized material
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