DIFF Subgroup
G11B 7/0033 with cards
Introduced: January 2000
Full Title
Full titles differ between systems:
IPC:
Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor > Recording, reproducing or erasing systems characterised by the shape of the carrier > with cards
CPC:
Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation , reproducing using an optical beam at lower power ; Record carriers therefor (G11B11/00, G11B13/00 take precedence) > Recording, reproducing or erasing systems characterised by the shape of the carrier > with cards
No child classifications to compare. This is a leaf node in both IPC and CPC.