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PCE
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DIFF Subgroup
G11B 27/13

the information being derived from movement of the record carrier, e.g. using tachometer

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 > the information being derived from movement of the record carrier, e.g. using tachometer

IPC and CPC are identically structured here. All 2 subcodes exist in both systems.

IPC defines codes here since 1985.

Child Classifications

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  • G11B 27/15 using mechanical sensing means since 1985 IPC+CPC Available in IPC and CPC
  • G11B 27/17 using electrical sensing means since 1985 IPC+CPC Available in IPC and CPC