DIFF Subgroup
G11B 27/11 by using information not detectable on the record carrier
Introduced: January 1985
Full Title
Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel > Indexing; Addressing; Timing or synchronising; Measuring tape travel > by using information not detectable on the record carrier
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
IPC defines codes here since 1985.
Child Classifications
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- G11B 27/13 the information being derived from movement of the record carrier, e.g. using tachometer since 1985 IPC+CPC Available in IPC and CPC