|
US2651513A
|
|
Method of mining and handling coal
|
|
US2648535A
|
|
Apparatus for gaseous reduction of iron ore
|
|
US2566427A
|
|
Mine car wheel bearing support
|
|
US2537787A
|
|
Sheltered seat
|
|
GB596955A
|
|
Mining machine
|
|
US2407449A
|
|
Mine car coupler
|
|
US2471042A
|
|
Coal handling system
|
|
US2393811A
|
|
Swivel door counter
|
|
US2407448A
|
|
Mining machine
|
|
US2384397A
|
|
Machine for driving slopes and air courses in mines
|
|
US2465479A
|
|
Mine car wheel bearing structure
|
|
US2320653A
|
|
Mining apparatus
|
|
US2179100A
|
|
Rolling car dump
|
|
US2142412A
|
|
Mine car
|
|
US2142411A
|
|
Automatic swivel coupler
|
|
US2105505A
|
|
Mining machine
|
|
US2105504A
|
|
Method of mining coal
|
|
US1919528A
|
|
Method and apparatus for mining double or parted seams
|
|
US1946034A
|
|
Mine roof support
|
|
US1706985A
|
|
Roller support for rotary dumps
|
