IPC Subgroup
H04M 15/18 according to duration of call
Introduced: September 1968
Last revised: January 2006
Full Title
Arrangements for metering, time-control or time-indication > Metering calls from calling party > Discriminative metering > according to duration of call
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- TELEPHONIC COMMUNICATION
1 direct subcode
Child Classifications
Navigate with arrow keys, Enter to open
- H04M 15/2 Operator's time recording or indicating arrangements