Recording simultaneously or selectively by methods or means covered by different main groups; Record carriers therefor; Reproducing simultaneously or selectively therefrom

Classification Context

Section:

PHYSICS

Class:

INFORMATION STORAGE

Subclass:

INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER

Child Classifications

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• G11B 13/02 magnetically and by styli
• G11B 13/04 magnetically and optically
• G11B 13/06 optically and by styli
• G11B 13/08 using near-field interactions or transducing means and at least one other method or means for recording or reproducing