H04L 27/2601 — IPC vs CPC Diff | Patent Classification Explorer

DIFF Subgroup

H04L 27/2601

Full Title

Modulated-carrier systems > Systems using multi-frequency codes (H04L27/32 takes precedence)

Of 5 combined children, 0 exist in both systems.

5 codes are CPC-only extensions.

This code exists only in CPC.

Diff view requires codes present in both systems.