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IPC Subgroup
G11B 23/18

Record carriers with multiple tracks, e.g. with complementary and partial tracks such as paired "stereo" tracks

Introduced: September 1968

Last revised: January 2006

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 > Record carriers with multiple tracks, e.g. with complementary and partial tracks such as paired "stereo" tracks

Classification Context

Section:
PHYSICS
Class:
INFORMATION STORAGE
Subclass:
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER