FR1228286A
(en )
1960-08-29
Coal hydrogenation process
BE586767A
(en )
1960-05-16
Method and device for electrusion
BE587219R
(en )
1960-05-30
Method and device for the extraction of coal and other minerals
FR1238717A
(en )
1960-08-19
Method and device for refining semiconductors
FR77183E
(en )
1962-01-27
Method and device for the extraction of coal and other minerals
FR1269248A
(en )
1961-08-11
Method and device for the mechanical extraction of coal and other minerals
FR1191358A
(en )
1959-10-19
Method and device for the extraction of coal and other minerals
FR1319780A
(en )
1963-03-01
Method and device for the enrichment of minerals
FR1211137A
(en )
1960-03-14
Device for removing coal and other minerals
FR1286597A
(en )
1962-03-02
Process and installation for coal mining
FR1190941A
(en )
1959-10-15
Conveyor bridge for the transfer of coal and other minerals
FR1210515A
(en )
1960-03-09
Method and device for the felling of coal, usable in particular in mines
FR1168622A
(en )
1958-12-11
Method and device for improving the accuracy of projectiles
FR1315205A
(en )
1963-01-18
Process and apparatus for the mining of coal and other minerals
FR1254880A
(en )
1961-02-24
Method and device for crushing coal at face size
FR1227281A
(en )
1960-08-19
Magnetic separation method and device
FR1245110A
(en )
1960-11-04
Method and device for the production of charcoal
BE573464A
(en )
1959-04-01
Process and device for the removal of coal, usable in particular in mines.
FR68638E
(en )
1958-05-05
Device for the slaughtering and loading of coal and other minerals
FR1183395A
(en )
1959-07-07
Method and device for degassing coal
BE604406R
(en )
1961-11-30
Method and device for the enrichment of minerals
FR1239296A
(en )
1960-08-19
Coal hydrogenation process
BE602884A
(en )
1961-10-23
Process and installation for coal mining.
FR1190738A
(en )
1959-10-14
Method and device for the mechanical mining of coal in steeply dipping or side seams
FR1188345A
(en )
1959-09-22
Method and device for the separation of waste rock from raw coal