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US1669239A
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Pulverizer
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US1595152A
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Powdered-material tank car
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US1578006A
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Pulverizer feeder with magnetic separator
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US1595151A
|
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Conveyer firing system for pulverized fuel
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US1549969A
|
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Smooth-passage three-way valve for powdered material
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US1549968A
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Powdered-material-distributing system
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US1578429A
|
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Switching valve
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US1549966A
|
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Valve for powdered fuel, weighing distributing system
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US1495479A
|
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Powdered-fuel furnace feeder
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US1420312A
|
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Melting furnace
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US1465665A
|
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Delivery tank for powdered material
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US1484019A
|
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Furnace
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US1531392A
|
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Air and gas valve mechanism for melting furnaces
|
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US1477823A
|
|
Rotary drier
|
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US1669084A
|
|
Powdered-coal distribution system
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US1457521A
|
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Powdered-coal apparatus
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US1457522A
|
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Powdered-coal apparatus
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