Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
DIFF Subgroup Additional Only
H04M 2203/50

related to audio conference

Full Title

Aspects of automatic or semi-automatic exchanges > related to audio conference

Of 10 combined children, 0 exist in both systems.

10 codes are CPC-only extensions.

Note: 10 CPC extensions are marked as secondary classification only.