DIFF Subgroup
H04M 15/34 metering arrangements for private branch exchanges
Introduced: September 1968
Title
Titles differ between systems:
IPC: Metering arrangements for private branch exchanges
CPC: metering arrangements for private branch exchanges
Full Title
Full titles differ between systems:
IPC:
Arrangements for metering, time-control or time-indication > Metering arrangements for private branch exchanges
CPC:
Arrangements for metering, time-control or time indication > metering arrangements for private branch exchanges
No child classifications to compare. This is a leaf node in both IPC and CPC.