IPC Subgroup
G11B 3/72 Groove formations, e.g. run-in groove, run-out groove
Introduced: September 1968
Last revised: January 2006
Full Title
Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor > Record carriers > Groove formations, e.g. run-in groove, run-out groove
Classification Context
- Section:
- PHYSICS
- Class:
- INFORMATION STORAGE
- Subclass:
- INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
2 direct subcodes
Child Classifications
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