Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor

Child Classifications

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• G11B 11/002
• G11B 11/03 using recording by deforming with non-mechanical means, e.g. laser, beam of particles
• G11B 11/08 using recording by electric charge or by variation of electric resistance or capacitance
• G11B 11/10 using recording by magnetic means
• G11B 11/12 using recording by optical means (G11B11/03 takes precedence )
• G11B 11/16 using recording by mechanical cutting, deforming or pressing
• G11B 11/24 using recording by near-field interactions