CPC Subgroup
G11B 19/041 Full Title
Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function > Control of operating function, e.g. switching from recording to reproducing > Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions
4 direct subcodes
Child Classifications
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