DIFF Subgroup
G11B 13/06 optically and by styli
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 > optically and by styli
CPC:
Recording simultaneously or selectively by methods covered by different main groups ; Record carriers therefor ; Reproducing therefrom > optically and by styli
No child classifications to compare. This is a leaf node in both IPC and CPC.