IPC Subgroup
H04M 1/64 Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers; Arrangements for recording conversations
Introduced: September 1968
Last revised: January 2006
Full Title
Substation equipment, e.g. for use by subscribers > Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers; Arrangements for recording conversations
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- TELEPHONIC COMMUNICATION
Related Keywords
TELEPHONE(S) answering
1 direct subcode
Child Classifications
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- H04M 1/65 Recording arrangements