|
US1240824A
|
|
Process of concentration of metalliferous ores.
|
|
US1192037A
|
|
Process of volatilizing metals.
|
|
US1169530A
|
|
Process of volatilizing ores.
|
|
US1083057A
|
|
Fume-arrester.
|
|
US1191280A
|
|
Ore-classifying machine.
|
|
US1262453A
|
|
Process for volatilizing ores.
|
|
US1262452A
|
|
Process of volatilizing ores.
|
|
CA119032A
|
|
Smoke condenser and purifier
|
|
US922260A
|
|
Apparatus for condensing and purifying smoke, &c.
|
|
CA104019A
|
|
Furnace for roasting and volatilizing ores
|
|
GB190619229A
|
|
Improvements in or relating to Ore Roasting and Volatilizing Furnace.
|
|
US796956A
|
|
Fume-arrester.
|
|
CA77361A
|
|
Toy
|
