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PCE
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DIFF Subgroup
G11B 23/30

with provision for auxiliary signals

Introduced: September 1968

Full Title

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 > with provision for auxiliary signals

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

Child Classifications

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  • G11B 23/32 Electrical or mechanical contacting means; Tape stop foils IPC+CPC Available in IPC and CPC
  • G11B 23/34 Signal means additional to the main recording track, e.g. photoelectric sensing of sprocket holes for timing IPC+CPC Available in IPC and CPC
  • G11B 23/36 Signals on record carriers or on containers and recorded by the same method as the main recording IPC+CPC Available in IPC and CPC