Fine material screw washer
Funnel apparatus for mining gold
Gold and silver separator
Gold mining pan
Gold pan
Gold pan with agitator knobules and insert cup
Gold pan with flukes and stratifiers
Gold pan with water delivery cups
Gold retrieving pan
Gold separator
Gravel washer separator
Gravitational separation
Gravitational separator employing an improved eluent supply syst
Hand held classifying device
Heavy metals separator
Jig pulsion mechanism
Jigging method and apparatus for gravity separation in the fine
Jigging screen device with pneumatic valve control
Log washer with staggered paddles
Material concentrator