Patent classifications
E
FIXED CONSTRUCTIONS
Load children
E21
EARTH OR ROCK DRILLING; MINING
Load children
E21C
MINING OR QUARRYING
Load children
47/00
Machines for obtaining or the removal of materials in open-pit mines
Load children Filter patents View analytics View as hierarchy
E21C47/02
for coal, brown coal, or the like
Load children Filter patents View analytics View as hierarchy
E21C47/04
Conveyor bridges used in co-operation with the winning apparatus
Filter patents View analytics View as hierarchy