|
GB326493A
|
|
Improvements in and relating to the carbonization or gasification of coal and the like
|
|
GB275827A
|
|
Improvements in or relating to heading machines
|
|
GB272435A
|
|
Improvements in mining machines
|
|
GB272839A
|
|
Improvements in or relating to mining machine tools
|
|
GB259532A
|
|
Mining and loading machines
|
|
GB253475A
|
|
Methods of mining
|
|
GB244392A
|
|
Improvements in or relating to mining machines
|
|
GB240115A
|
|
Improvements in or relating to mining machines
|
|
GB237772A
|
|
Improvements in or relating to mining machines
|
|
GB234893A
|
|
Improvements in or relating to mining machines
|
|
GB234557A
|
|
Improvements in or relating to mining apparatus
|
|
GB211876A
|
|
Improvements in or relating to mining machines
|
|
US1182453A
|
|
Mining-machine.
|
|
US966425A
|
|
Coke drawer and loader.
|
