DIFF Subgroup
E04H 12/18 movable or with movable sections, e.g. rotatable or telescopic
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures > movable or with movable sections, e.g. rotatable or telescopic
CPC:
Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures (cooling towers E04H5/12; derricks for oil drilling E21B15/00) > movable or with movable sections, e.g. rotatable or telescopic
Of 3 combined children, 0 exist in both systems.
3 codes are CPC-only extensions.
Child Classifications
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