H04S 3/002 — IPC vs CPC Diff | Patent Classification Explorer

DIFF Subgroup

H04S 3/002

Full Title

Systems employing more than two channels, e.g. quadraphonic (H04S5/00, H04S7/00 take precedence)

Of 1 combined children, 0 exist in both systems.

1 codes are CPC-only extensions.

This code exists only in CPC.

Diff view requires codes present in both systems.