Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus

Child Classifications

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• G11B 23/0007 CPC only CPC only
• G11B 23/0014 +1 CPC CPC only CPC only
• G11B 23/0057 +1 CPC CPC only CPC only
• G11B 23/02 Containers; Storing means +1 CPC IPC+CPC Available in IPC and CPC
• G11B 23/14 providing ability to repeat location, e.g. using sprocket holes IPC+CPC Available in IPC and CPC
• G11B 23/16 Record carriers with single-track for recording at spaced intervals along the track thereof, e.g. for speech or language training IPC+CPC Available in IPC and CPC
• G11B 23/18 Record carriers with multiple tracks, e.g. with complementary and partial tracks such as paired "stereo" tracks IPC+CPC Available in IPC and CPC
• G11B 23/20 with provision for splicing to provide permanent or temporary connections IPC+CPC Available in IPC and CPC
• G11B 23/28 Indicating prior or unauthorised use, +5 CPC IPC+CPC Available in IPC and CPC
• G11B 23/30 with provision for auxiliary signals IPC+CPC Available in IPC and CPC
• G11B 23/38 Visual features other than those contained in record tracks or represented by sprocket holes IPC+CPC Available in IPC and CPC
• G11B 23/50 Reconditioning of record carriers; Cleaning of record carriers (G11B3/58 takes precedence) since 1974 +2 CPC IPC+CPC Available in IPC and CPC