DIFF Subgroup
G11B 23/08707 Full Title
Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus > Containers; Storing means > Magazines; Cassettes (G11B23/12 takes precedence ) > for housing webs or filaments having two distinct ends > using two different reels or cores
Of 9 combined children, 0 exist in both systems.
9 codes are CPC-only extensions.