DIFF Subgroup
H04Q 3/74 Identification of subscriber calling from a party-line
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Selecting arrangements > Finding out and indicating number of calling subscriber > Identification of subscriber calling from a party-line
CPC:
Selecting arrangements (H04Q5/00 - H04Q11/00 take precedence) > Finding out and indicating number of calling subscriber > Identification of subscriber calling from a party-line
No child classifications to compare. This is a leaf node in both IPC and CPC.