DIFF Subgroup
H04M 3/18 with means for reducing interference ; with means for reducing effects due to line faults
Introduced: September 1968
Title
Titles differ between systems:
IPC: with means for reducing interference; with means for reducing effects due to line faults
CPC: with means for reducing interference ; with means for reducing effects due to line faults
Full Title
Full titles differ between systems:
IPC:
Automatic or semi-automatic exchanges > with means for reducing interference; with means for reducing effects due to line faults
CPC:
Automatic or semi-automatic exchanges > with means for reducing interference ; with means for reducing effects due to line faults
No child classifications to compare. This is a leaf node in both IPC and CPC.