|
CA193263A
|
|
Amalgamator and separator
|
|
CA183716A
|
|
Rock drill
|
|
CA194551A
|
|
Pump
|
|
CA190102A
|
|
Separator for gold and silver
|
|
US1254484A
|
|
Machine for separating gold, silver, and the like from sands.
|
|
GB191010903A
|
|
Improvements in Screening or Filtering Apparatus for Drying Wet Materials.
|
|
CA125742A
|
|
Drier
|
|
US948477A
|
|
Apparatus for drying wet materials.
|
|
CA119749A
|
|
Filter
|
|
US935359A
|
|
Filtering apparatus.
|
|
CA379702A
|
|
Oil extraction
|
|
CA212041A
|
|
Device for extracting oil and gas from bitiuminous sands
|
|
CA226379A
|
|
Process of ground distillation
|
|
CA199500A
|
|
Heater for wells
|
|
CA207817A
|
|
Ore reduction apparatus
|
|
CA201541A
|
|
Electrical heater for wells
|
