DIFF Subgroup
G11B 21/12 Raising and lowering; Back-spacing or forward-spacing along track; Returning to starting position
Introduced: September 1968
Full Title
Head arrangements not specific to the method of recording or reproducing > Driving or moving of heads > Raising and lowering; Back-spacing or forward-spacing along track; Returning to starting position
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
Child Classifications
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