DIFF Subgroup
E21C 27/42 combined with scraper or collector box
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Machines which completely free the mineral from the seam > Mineral freed by means not involving slitting > by adjustable or non-adjustable planing means with or without loading arrangements > combined with scraper or collector box
CPC:
Machines which completely free the mineral from the seam > Mineral freed by means not involving slitting > by adjustable or non-adjustable planing means with or without loading arrangements (by percussed planing means E21C27/46) > combined with scraper or collector box
No child classifications to compare. This is a leaf node in both IPC and CPC.