DIFF Subgroup
E04H 12/26 Winding towers for mines
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures > Winding towers for mines
CPC:
Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures (cooling towers E04H5/12; derricks for oil drilling E21B15/00) > Winding towers for mines
No child classifications to compare. This is a leaf node in both IPC and CPC.