on a base layer

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor > Record carriers characterised by the selection of the material > comprising one or more layers of magnetisable particles homogeneously mixed with a bonding agent > on a base layer

CPC:

Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor (G11B11/00 take precedence) > Record carriers characterised by the selection of the material > comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent > on a base layer

Of 8 combined children, 7 exist in both systems.

1 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1985.

Child Classifications

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G11B 5/7013 CPC only CPC only
G11B 5/702 characterised by the bonding agent since 1985 +6 CPC IPC+CPC Available in IPC and CPC
G11B 5/706 characterised by the composition of the magnetic material since 1985 +2 CPC IPC+CPC Available in IPC and CPC
G11B 5/708 characterised by addition of non-magnetic particles to the layer since 1985 +1 CPC IPC+CPC Available in IPC and CPC
G11B 5/71 characterised by the lubricant since 1985 IPC+CPC Available in IPC and CPC
G11B 5/712 characterised by the surface treatment or coating of magnetic particles since 1985 IPC+CPC Available in IPC and CPC
G11B 5/714 characterised by the dimension of the magnetic particles since 1985 IPC+CPC Available in IPC and CPC
G11B 5/716 characterised by two or more magnetic layers since 1985 IPC+CPC Available in IPC and CPC