DIFF Subgroup
H04Q 3/40 for stages after the line selector, e.g. for extension selector
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Selecting arrangements > Circuit arrangements for second or subsequent stages of hunting switching > for stages after the line selector, e.g. for extension selector
CPC:
Selecting arrangements (H04Q5/00 - H04Q11/00 take precedence) > Circuit arrangements for second or subsequent stages of hunting switching > for stages after the line selector, e.g. for extension selector
No child classifications to compare. This is a leaf node in both IPC and CPC.