DIFF Subgroup
G11B 17/0282 Full Title
Guiding record carriers not specifically of filamentary or web form, or of supports therefor (guiding cards or sheets G06K13/00) > Details > Positioning or locking of single discs > of discs rotating during transducing operation
Of 1 combined children, 0 exist in both systems.
1 codes are CPC-only extensions.