IPC Main Group
G11B 31/00 Arrangements for the associated working of recording or reproducing apparatus with related apparatus
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- PHYSICS
- Class:
- INFORMATION STORAGE
- Subclass:
- INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
Scope Notes
Application references: Substation equipment for recording telephonic conversations or messages for absent subscribers
1 direct subcode
Child Classifications
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- G11B 31/02 with automatic musical instruments