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US1315992A
|
|
Electrode for electric furnaces.
|
|
US989148A
|
|
Carbon-holder for electric furnaces.
|
|
US1061612A
|
|
Regulating electric furnaces.
|
|
US908407A
|
|
Electric furnace.
|
|
US914346A
|
|
Method of operating electric furnaces.
|
|
US871273A
|
|
Electric furnace and method.
|
|
CA106295A
|
|
Iron manufacture
|
|
US928551A
|
|
Method of refining iron.
|
|
CA101327A
|
|
Electric furnaces
|
|
CA100225A
|
|
Holder for electrodes
|
|
CA101192A
|
|
Electric smelting
|
|
US851167A
|
|
Process of purifying metals.
|
|
US861280A
|
|
Electric smelting.
|
|
US871338A
|
|
Electric furnace.
|
|
US858718A
|
|
Electric furnace.
|
|
US815293A
|
|
Apparatus for smelting iron ore.
|
|
CA96379A
|
|
Process of smelting iron ore
|
|
US815016A
|
|
Process of smelting iron ore.
|
|
US807028A
|
|
Process of obtaining sound ingots.
|
|
US807026A
|
|
Process of converting cast-iron into iron or steel.
|
