DIFF Subgroup
E21C 47/08 Devices for cutting-out partings, e.g. layers of sand between seams of coal
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Machines for obtaining, or the removal of, materials in open-pit mines > for coal, brown coal, or the like > Devices for cutting-out partings, e.g. layers of sand between seams of coal
CPC:
Machines for obtaining or the removal of materials in open-pit mines (obtaining peat E21C49/00) > for coal, brown coal, or the like (dredgers or soil-shifting machines in general E02F) > Devices for cutting-out partings, e.g. layers of sand between seams of coal
No child classifications to compare. This is a leaf node in both IPC and CPC.