FR1379611A
(en )
1964-11-27
Improvements to hydraulic installations for ore recovery
BE606425A
(en )
1961-11-16
New method for the exploitation of coal mines
BE618694R
(en )
1962-10-01
New method for the exploitation of coal mines
FR1316824A
(en )
1963-02-01
Framework for mining
FR1340736A
(en )
1963-10-18
Method for increasing the efficiency of camouflaged shaped charge mines
FR1316636A
(en )
1963-02-01
Method of mining coal and mechanical devices for the application of this method
FR1258759A
(en )
1961-04-14
Progression device for mining
MY6500027A
(en )
1965-12-31
Process of hydrochracking hydrocarbon oil
FR1156594A
(en )
1958-05-19
Machine for mining
FR1235126A
(en )
1960-07-01
Further training for carriers for mining
FR1286597A
(en )
1962-03-02
Process and installation for coal mining
CA606742A
(en )
1960-10-11
Recovery of oil from tar sands
BE602884A
(en )
1961-10-23
Process and installation for coal mining.
BE584495A
(en )
1960-03-01
Improvements to machines for mining.
FR1155537A
(en )
1958-05-05
Harvester for the exploitation of inclined mining deposits
CA621961A
(en )
1961-06-13
Recovery of oil from bituminous sands
FR80824E
(en )
1963-06-21
Improvements made to retaining frames for mine clearance corridors
FR1198975A
(en )
1959-12-10
Mine pit installation
FR1283373A
(en )
1962-02-02
Metal lining for mine supports
FR1311421A
(en )
1962-12-07
Advanced machine for mining minerals
FR1232245A
(en )
1960-10-06
Coal mining machine
FR1288340A
(en )
1962-03-24
Machine for mining coal and other minerals
AU249221B2
(en )
1963-05-02
Recovery of oil from oil shale andthe like
CA592501A
(en )
1960-02-16
Recovery of oil from tar sands
CA633321A
(en )
1961-12-26
Method for increasing recovery of oil