characterised by two or more magnetic layers

Full Title

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 > characterised by two or more magnetic layers

Child Classifications

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• G11B 5/718 at least one on each side of the base layer