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PCE
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DIFF Subgroup
G11B 7/24018

Laminated discs (G11B7/24015 takes precedence)

Introduced: January 2013

Title

Titles differ between systems:

IPC: Laminated discs

CPC: Laminated discs (G11B7/24015 takes precedence)

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 > Record carriers characterised by shape, structure or physical properties, or by the selection of the material > Laminated discs

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) > Record carriers characterised by shape, structure or physical properties, or by the selection of the material (characterised by the arrangement of information on the carrier G11B7/007) > Laminated discs (G11B7/24015 takes precedence)

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

1 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 2013.

Child Classifications

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  • G11B 7/24021 provided with a special shape or structure for centering or eccentricity prevention, e.g. alignment since 2013 IPC+CPC Available in IPC and CPC
  • G11B 7/24024 Adhesion or bonding, e.g. specific adhesive layers since 2013 IPC+CPC Available in IPC and CPC
  • G11B 7/24027 Layers; Shape, structure or physical properties thereof (G11B7/24021, G11B7/24024 take precedence) since 2013 IPC+CPC Available in IPC and CPC