Patent classifications
E
FIXED CONSTRUCTIONS
Load children
E21
EARTH OR ROCK DRILLING; MINING
Load children
E21F
SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
Load children
13/00
Transport specially adapted to underground conditions
Load children Filter patents View analytics View as hierarchy
E21F13/02
Transport of mined mineral; in galleries
Load children Filter patents View analytics View as hierarchy