Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
DIFF Subgroup
H04H 20/31

using in-band signals, e.g. subsonic or cue signal

Introduced: January 2008

Full Title

Arrangements for broadcast or for distribution combined with broadcast > Arrangements for simultaneous broadcast of plural pieces of information > by a single channel > using in-band signals, e.g. subsonic or cue signal

No child classifications to compare. This is a leaf node in both IPC and CPC.