DIFF Subgroup Additional Only
G03G 2221/1678 Frame structures
Full Title
Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination > Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts > Frame structures
Of 4 combined children, 0 exist in both systems.
4 codes are CPC-only extensions.
Note: 4 CPC extensions are marked as secondary classification only.