Patent classifications
E
FIXED CONSTRUCTIONS
Load children
E21
EARTH OR ROCK DRILLING; MINING
Load children
E21C
MINING OR QUARRYING
Load children
31/00
Driving means incorporated in machines for slitting or completely freeing the mineral from the seam
Load children Filter patents View analytics View as hierarchy
E21C31/02
for cutting or breaking-down devices
Load children Filter patents View analytics View as hierarchy
E21C31/04
imparting both a rotary and reciprocating motion
Filter patents View analytics View as hierarchy