|
US1010490A
|
|
Method of reducing ores.
|
|
US932459A
|
|
Method of reducing and melting oxids and the like.
|
|
CA121300A
|
|
Electric transformer furnace
|
|
US932013A
|
|
Electric transformer-furnace.
|
|
GB190629271A
|
|
Improvements in Electric Transformer Furnaces.
|
|
GB190622519A
|
|
Improvements in Electric Transformer Furnaces.
|
|
GB190610097A
|
|
Method of and Furnace Plant for Reduction of Ores or the like by Electric Transformer-furnaces.
|
|
CA98405A
|
|
Method of reducing ores, etc.
|
|
CA98404A
|
|
Electric transformer furnace
|
|
GB190525771A
|
|
Improvements in Electric Transformer Furnaces.
|
|
US938752A
|
|
Method of working metals, ores, and the like.
|
|
CA87552A
|
|
Electric transformer furnace
|
|
US917040A
|
|
Electric transformer-furnace.
|
|
GB190404866A
|
|
Improvements in Electric Furnaces.
|
