DIFF Subgroup
G11B 13/04 magnetically and optically
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Recording simultaneously or selectively by methods or means covered by different main groups; Record carriers therefor; Reproducing simultaneously or selectively therefrom > magnetically and optically
CPC:
Recording simultaneously or selectively by methods covered by different main groups ; Record carriers therefor ; Reproducing therefrom > magnetically and optically
Of 1 combined children, 0 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
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