DIFF Subgroup
H04Q 1/54 Amplifier switched-on automatically in dependence on automatically-selected lines
Introduced: September 1968
Title
Titles differ between systems:
IPC: Amplifier switched-on automatically in dependence on automatically selected lines
CPC: Amplifier switched-on automatically in dependence on automatically-selected lines
Full Title
Full titles differ between systems:
IPC:
Details of selecting apparatus or arrangements > Electrical details > Amplifier switched-on automatically in dependence on automatically selected lines
CPC:
Details of selecting apparatus or arrangements > Electrical details > Amplifier switched-on automatically in dependence on automatically-selected lines
No child classifications to compare. This is a leaf node in both IPC and CPC.