|
US1283236A
|
|
Obtainment of gold and silver from their ores.
|
|
CA191091A
|
|
Copper production
|
|
GB112876A
|
|
Improvements in or relating to the Obtainment of Gold and Silver from their Ores.
|
|
US1282892A
|
|
Treatment of copper ores.
|
|
GB191507384A
|
|
Improvements in the Manufacture of Figures, Statues or the like.
|
|
CA147261A
|
|
Metal amalgamator
|
|
GB190924003A
|
|
Improvements relating to the Treatment of Auriferous or Argentiferous Minerals.
|
|
CA61564A
|
|
Amalgamator
|
|
GB189717386A
|
|
Improvements in Amalgamating Apparatus.
|
|
CA218817A
|
|
Electrolytic extraction of gold and silver
|
|
CA218987A
|
|
Copper recovery
|
